United Fire & Casualty Company Completes Acquisition of Mercer Insurance Group, Inc.

CEDAR RAPIDS, Iowa, March 28, 2011 (GLOBE NEWSWIRE) -- United Fire & Casualty
Company (Nasdaq:UFCS) today announced that it has completed its acquisition of
Mercer Insurance Group, Inc. (Nasdaq:MIGP).

With this acquisition, initially announced on November 30, 2010, there is no
overlap between the agency networks of United Fire and Mercer, as Mercer
primarily markets in six Western and Mid-Atlantic states in which United Fire
has no appointed property and casualty agencies. United Fire will now market
through over 1,000 independent agencies, diversifying exposure to weather and
other catastrophe risks across our geographic markets. Also with the completion
of the acquisition, the combined company will be able to build on common
conservative underwriting and investment cultures.

"The completion of this transaction marks an important milestone for United
Fire," said Randy A. Ramlo, president and chief executive officer of United
Fire. "Today, we significantly expanded our resources to better serve our
policyholders and agents by offering additional products and services. With
Mercer Insurance, we know that our shared focus on underwriting profitability
will achieve the continued strong, consistent results our United Fire
stockholders expect."

Under the terms of the merger agreement, Mercer Insurance stockholders will
receive $28.25 per share in cash, representing an aggregate transaction value of
approximately $191 million. As previously reported, United Fire anticipates the
acquisition will contribute to its net income and return on equity no later than
2012.

About United Fire & Casualty Company and subsidiaries

Founded in 1946, United Fire & Casualty Company and its subsidiaries are engaged
in the business of writing property and casualty insurance and life insurance,
and selling annuities. Our company's net premiums written totaled $463.9 million
through the year ended December 31, 2010, and our market capitalization was
$584.7 million at December 31, 2010.

United Fire and its property and casualty insurance subsidiaries are licensed in
43 states, plus the District of Columbia, and represented by approximately 800
independent agencies. Our line of products consists of commercial insurance
(including surety bonds) and personal insurance. Approximately 91 percent of
property and casualty premiums written are commercial in nature.

United Fire is rated A (Excellent) by A.M. Best Company. For the third
consecutive year, United Fire was named a "Top 10 Ease of Doing Business
Performer" for 2010 in Deep Customer Connections Inc.'s (DCC) eighth annual Ease
of Doing Business (EDB) survey. The performance of more than 200 property and
casualty carriers was assessed by 7,800 independent agents and brokers. They
rated the importance of 11 key factors, ranging from underwriting responsiveness
to handling claims promptly to employing effective, user-friendly technology.
DCC specializes in helping property and casualty carriers achieve profitable
growth by making it easy for their agents to work with them. DCC's EDB Index(R)
is an industry benchmark of carriers' EDB performance. United Fire has also been
named one of the Most Trustworthy Publicly Traded Companies in America, a list
compiled through a partnership with Forbes and Audit Integrity. According to the
stringent Audit Integrity standards for transparency and fair governance, less
than five percent of the entire U.S. stock market qualifies for inclusion on the
list.

Our subsidiary, United Life Insurance Company, is licensed in 28 states,
represented by over 900 independent life agencies, and has been named to the
Ward's 50 Life & Health Insurance Companies for five consecutive years
(2006-2010).

The United Fire & Casualty Company logo is available at
http://www.globenewswire.com/newsroom/prs/?pkgid=7089

About Mercer Insurance Group

Mercer Insurance Group, Inc. offers commercial and personal lines of insurance
to businesses and individuals principally in New Jersey, Pennsylvania, Arizona,
California, Nevada and Oregon through its insurance subsidiaries: Mercer
Insurance Company, Mercer Insurance Company of New Jersey, Inc., Financial
Pacific Insurance Company and Franklin Insurance Company. Upon announcement of
the merger in November 2010, A.M. Best affirmed Mercer's A (Excellent) group
rating with a negative outlook.

On February 23, 2011, Mercer reported net premiums written of $132.7 million, a
GAAP combined ratio of 96.4 percent and net income of $14.7 million, or $2.28
per diluted share, for the year ended December 31, 2010. At December 31, 2010,
book value per share was $27.88.

Disclosure of forward-looking statements

This release may contain forward-looking statements about our operations,
anticipated performance and other similar matters. The Private Securities
Litigation Reform Act of 1995 provides a safe harbor under the Securities Act of
1933 and the Securities Exchange Act of 1934 for forward-looking statements. The
forward-looking statements are not historical facts and involve risks and
uncertainties that could cause actual results to differ materially from those
expected and/or projected. Such forward-looking statements are based on current
expectations, estimates, forecasts and projections about our company, the
industry in which we operate, and beliefs and assumptions made by management.
Words such as "expect(s)," "anticipate(s)," "intend(s)," "plan(s),"
"believe(s)," "continue(s)," "seek(s)," "estimate(s)," "goal(s)," "target(s),"
"forecast(s)," "project(s)," "predict(s)," "should," "could," "may," "will
continue," "might," "hope," "can" and other words and terms of similar meaning
or expression in connection with a discussion of future operating, financial
performance or financial condition, are intended to identify forward-looking
statements. These statements are not guarantees of future performance and
involve risks, uncertainties and assumptions that are difficult to predict.
Therefore, actual outcomes and results may differ materially from what is
expressed in such forward-looking statements. Information concerning factors
that could cause actual results to differ materially from those in the
forward-looking statements is contained in Part I Item 1A "Risk Factors" of our
annual report on Form 10-K for the year ended December, 31, 2010, filed with the
SEC on March 1, 2011. The risks identified on Form 10-K are representative of
the risks, uncertainties, and assumptions that could cause actual outcomes and
results to differ materially from what is expressed in forward-looking
statements. Readers are cautioned not to place undue reliance on these
forward-looking statements, which speak only as of the date of this release or
as of the date they are made.

Additional Information

Investors and shareholders are advised to read any relevant documents filed with
the SEC by United Fire and Mercer as they become available. Those documents
contain important information about United Fire and Mercer.

Investors and shareholders may obtain free copies of documents filed by United
Fire and Mercer Insurance (when available) at the SEC's website at
http://www.sec.gov, at United Fire's website at http://www.unitedfiregroup.com,
or at Mercer's website at http://www.mercerins.com. Documents may also be
obtained, when available, for free from United Fire by directing such request to
United Fire Group, Attn: Investor Relations, 118 Second Avenue SE, P.O. Box
73909, Cedar Rapids, IA 52407-3909.

CONTACT: Randy A. Ramlo, President/CEO or
Dianne M. Lyons, Vice President/CFO, 319-399-5700