Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statements of Comprehensive Income [Abstract]
Net earnings	$ 7,448us-gaap_ProfitLoss	$ 7,118us-gaap_ProfitLoss	$ 6,763us-gaap_ProfitLoss
Other comprehensive income (loss), net of tax:
Unrealized net holding gain (loss) on all other securities	6,660	(9,315)	1,379
Reclassification adjustment for net loss (gain) on securities recognized in net earnings	335	(411)	(427)
Other comprehensive income (loss)	6,995	(9,726)	952
Comprehensive income (loss)	$ 14,443us-gaap_ComprehensiveIncomeNetOfTax	$ (2,608)us-gaap_ComprehensiveIncomeNetOfTax	$ 7,715us-gaap_ComprehensiveIncomeNetOfTax

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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

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