Summary of Significant Accounting Policies (AOCI) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated other comprehensive income (loss), net of tax	$ (5,761)	$ 723
Realized gains on available-for-sale securities	1,192	452	$ 715
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Tax	(465)	(176)	(279)
Total reclassifications out of accumulated other comprehensive income	727	276	$ 436
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net unrealized losses on securities available-for-sale	(7,649)	3,243
Unamortized losses on securities held-to-maturity transferred from available-for-sale	(393)	(834)
Securities with other-than-temporary impairment losses	(1,398)	(1,224)
Tax benefit	3,134	(939)
Other Than Temporary Impairment Losses Investments Portion In Accumulated Other Comprehensive Income Loss Tax Including Portion Attributable To Noncontrolling Interest Available For Sale Securities	(545)	(477)
Other Comprehensive Income (Loss), Tax	3,679	(462)
Accumulated other comprehensive income (loss), net of tax	(4,908)	1,470
Accumulated Other Comprehensive Income (Loss), Other than Temporary Impairment, Not Credit Loss, Net of Tax, Debt Securities	$ 853	$ 747