Investments (Amortized Cost and Fair Value of Available-for-Sale Securities by Contractual Maturity (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Security obligations due, amortized cost, One to five years	$ 13,930
Security obligations due, amortized cost, Five to ten years	15,221
Security obligations due, amortized cost, After ten years	15,307
Total security obligations due	44,458
Available for sale, Amortized Cost	278,861	276,326
Security obligations due, Fair value, One to five years	14,054
Security obligations due, Fair value, Five to ten years	14,985
Security obligations due, Fair value, After ten years	11,536
Total Security obligations due, Fair value	40,575
Available for sale, Fair Value	277,104	281,197
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	113,687
Available for sale, Fair Value	114,709
Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	120,710
Available for sale, Fair Value	121,814
Small Business Administration [Member]
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost	6	8
Available for sale, Fair Value	$ 6	$ 8

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.

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