Investments (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Available-for-sale Securities [Abstract]
Amortized cost	$ 150,595	$ 155,074
Gross unrealized gains	11,042	10,601
Gross unrealized losses	(152)	(394)
Fair Value		165,281
Investment in mutual fund, available-for-sale, Amortized cost	7,501	7,501
Investment in mutual fund, available-for-sale, Gross unrealized gains	376	43
Investment in mutual fund, available-for-sale, Fair value	7,877	7,544
Total Amortized cost	150,595	162,575
Total gross unrealized gains	11,418	10,644
Total gross unrealized losses	(152)	(394)
Total Fair Value	161,861	172,825
U.S. government and agencies [Member]
Available-for-sale Securities [Abstract]
Amortized cost	22,184	24,178
Gross unrealized gains	1,234	1,350
Fair Value		25,528
State [Member]
Available-for-sale Securities [Abstract]
Amortized cost	5,010	6,099
Gross unrealized gains	194	288
Fair Value	5,204	6,387
Political Subdivisions [Member]
Available-for-sale Securities [Abstract]
Amortized cost	753	754
Gross unrealized gains	45	27
Fair Value	798	781
Revenue and Assessment [Member]
Available-for-sale Securities [Abstract]
Amortized cost	22,058	24,130
Gross unrealized gains	1,559	1,302
Gross unrealized losses	(11)
Fair Value	23,606	25,432
Corporate bonds [Member]
Available-for-sale Securities [Abstract]
Amortized cost	67,561	71,392
Gross unrealized gains	6,394	6,113
Gross unrealized losses		(208)
Fair Value	73,955	77,297
Non-agency backed - commercial [Member]
Available-for-sale Securities [Abstract]
Amortized cost	5,018	5,862
Gross unrealized gains	302	275
Gross unrealized losses		(12)
Fair Value	5,320	6,125
Non-agency backed - residential [Member]
Available-for-sale Securities [Abstract]
Amortized cost	5,349	5,530
Gross unrealized gains	143	66
Gross unrealized losses	(130)	(167)
Fair Value	5,362	5,429
Agency backed [Member]
Available-for-sale Securities [Abstract]
Amortized cost	13,485	16,953
Gross unrealized gains	956	1,180
Fair Value	14,441	18,133
Redeemable Preferred Stock [Member]
Available-for-sale Securities [Abstract]
Amortized cost	1,676	176
Gross unrealized gains	215
Gross unrealized losses	(11)	(7)
Fair Value	$ 1,880	$ 169

Gross unrealized gains.

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Gross unrealized losses.

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Investment in mutual fund available for sale amortized cost.

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Investment in mutual fund available for sale fair value.

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Investment in mutual fund available for sale gross unrealized gains

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This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

No definition available.

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This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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-SubTopic 10

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-Paragraph 1

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Amount of investment in debt and equity securities categorized neither as trading securities nor held-to-maturity securities and intended be sold or mature one year or operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Section A

-Paragraph 4, 5

-Chapter 3

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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