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Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of period	$ (1,767)	$ 5,474	$ (6,591)	$ 7,940
Unrealized gains (losses) arising during the period	5,101	(12,915)	12,558	(16,410)
Reclassification of realized gains during the period	(4)	(788)	(40)	(1,087)
Related deferred taxes	(1,784)	4,796	(4,381)	6,124
Net change	3,313	(8,907)	8,137	(11,373)
Balance at end of period	$ 1,546	$ (3,433)	$ 1,546	$ (3,433)

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Accumulated appreciation or loss, net of tax, in value of the total of available-for-sale securities at the end of an accounting period.

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Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.

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Amount of tax expense (benefit), after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.

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Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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Amount before tax and reclassification adjustments of unrealized holding gain (loss) on available-for-sale securities.

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