Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Before Tax
Balance at beginning of period	$ 6,712	$ (2,227)
Other comprehensive income (loss):
Unrealized holding gains (losses) arising during the period	(3,216)	9,864
Less: Reclassification adjustment for gains (losses) included in net income	(2,835)	(925)
Net unrealized gains (losses) on investments	(6,051)	8,939
Other comprehensive income (loss)	(6,051)	8,939
Balance at end of period	661	6,712	$ (2,227)
Tax Effect
Balance at beginning of period	(2,045)	780
Other comprehensive income (loss):
Unrealized holding gains (losses) arising during the period	664	(3,073)
Less: Reclassification adjustment for gains included in net income	621	248
Net unrealized gains (losses) on investments	1,285	(2,825)	2,080
Other comprehensive gain (loss)	1,285	(2,825)
Balance at end of period	(760)	(2,045)	780
Net of Tax
Balance at beginning of period	4,667	(1,447)
Other comprehensive income (loss):
Unrealized holding gains (losses) arising during the period	(2,552)	6,791
Less: Reclassification adjustment for gains (losses) included in net income	(2,214)	(677)
Net unrealized gains (losses) on investments	(4,766)	6,114	(3,861)
Total other comprehensive income (loss)	(4,766)	6,114	(3,861)
Balance at end of period	$ (99)	$ 4,667	$ (1,447)