Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Equity [Abstract]
Federal Statutory Income Tax Rate	35.00%	35.00%	35.00%
Other Comprehensive Income (Loss), Net of Tax
Unrealized holding gains (losses) arising during the period. before tax	$ (35,318)	$ 15,694	$ 30,474
Unrealized holding gains (losses) arising during the period, tax effect	12,361	(5,493)	(10,666)
Unrealized holding gains (losses) arising during the period, net of tax	(22,957)	10,201	19,808
Reclassification adjustment for (gains) losses included in net income, before tax	227	105	(1,277)
Reclassification adjustment for (gains) losses included in net income, tax effect	(79)	(36)	447
Reclassification adjustment for (gains) losses included in net income, net of tax	148	69	(830)
Effects on DAC and CCRA, before tax	1,135	(564)	(885)
Effects on DAC and CCRA, tax effect	(398)	197	310
Effects on DAC and CCRA, net of tax	737	(367)	(575)
Change in tax valuation allowance, before tax	0	0	0
Change in tax valuation allowance, tax effect	(20)	(188)	(570)
Change in tax valuation allowance, net of tax.	(20)	(188)	(570)
Other comprehensive income (loss), before tax	(33,956)	15,235	28,312
Other comprehensive income (loss), tax effect	11,864	(5,520)	(10,479)
Other comprehensive income (loss)	$ (22,092)	$ 9,715	$ 17,833