Stockholders' Equity and Earnings per Common Share (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Available-for-sale securities [Abstract]
Gain on sale of sale of available-for-sale securities, net	$ 87	$ 6	$ 87	$ 515
Tax benefit	30	2	30	175
Total	57	4	57	340
Other comprehensive income, pretax [Abstract]
Unrealized holding gains (losses) arising during the period			2,305	3,812
Reclassification adjustment for gains (loss) recognized in income, pretax	(87)	(6)	(87)	(515)
Net unrealized losses on securities, pretax			2,218	3,297
Total change in accumulated other comprehensive income or (loss), pretax			2,218	3,297
Other Comprehensive Income Tax Effect [Abstract]
Unrealized holding losses arising during the period			784	1,296
Reclassification adjustment for gains (losses) recognized in income, tax effect	(30)	(2)	(30)	(175)
Net unrealized losses on securities, tax effect			754	1,121
Other Comprehensive Income (Loss), Tax, Total			754	1,121
Other Comprehensive Income, Net of Tax [Abstract]
Unrealized holding losses arising during the period			1,521	2,516
Reclassification adjustment for gains recognized in income, net of tax	(57)	(4)	(57)	(340)
Net unrealized losses on securities, net of tax	$ 1,036	$ 1,661	1,464	2,176
Other comprehensive income, net of tax (total)			$ 1,464	$ 2,176