Stockholders' Equity and Earnings per Common Share (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Available-for-sale securities [Abstract]
Gain on sale of sale of available-for-sale securities, net	$ 0	$ 509
Tax benefit	0	173
Total	0	336
Other comprehensive income, pretax [Abstract]
Unrealized holding gains (losses) arising during the period	648	1,289
Reclassification adjustment for gains (loss) recognized in income, pretax	0	(509)
Net unrealized losses on securities, pretax	648	780
Total change in accumulated other comprehensive income or (loss), pretax	648	780
Other Comprehensive Income Tax Effect [Abstract]
Unrealized holding losses arising during the period	220	438
Reclassification adjustment for gains (losses) recognized in income, tax effect	0	(173)
Net unrealized losses on securities, tax effect	220	265
Other Comprehensive Income (Loss), Tax, Total	220	265
Other Comprehensive Income, Net of Tax [Abstract]
Unrealized holding losses arising during the period	428	851
Reclassification adjustment for gains recognized in income, net of tax	0	(336)
Net unrealized losses on securities, net of tax	428	515
Other comprehensive income, net of tax (total)	$ 428	$ 515