Other Comprehensive Income - Summary of the Tax Effects (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Other comprehensive income (loss): Securities available-for-sale: Before Tax Amount
Change in unrealized gains during period	$ 820	$ 2,802
Reclassification adjustment for gains included in net income	(6)	0
Other comprehensive income (loss): Securities available-for-sale: Tax Effect
Change in unrealized gains during period	(287)	(980)
Reclassification adjustment for gains included in net income	2	0
Other comprehensive income (loss): Securities available-for-sale: Net of Tax Amount
Change in unrealized gains during period	533	1,822
Reclassification adjustment for gains included in net income	(4)	0
Other comprehensive income (loss): Derivatives qualifying as hedges: Before Tax
Change in fair value of derivative instruments designated as cash flow hedges	13	0
Other Comprehensive Income (loss): Derivatives qualifying as hedges: Tax Effect
Change in fair value of derivative instruments designated as cash flow hedges	(5)	0
Other Comprehensive Income (loss): Derivatives qualifying as hedges: Net of Tax Amount
Change in fair value of derivative instruments designated as cash flow hedges	8	0
Total other comprehensive income, before tax	827	2,802
Total other comprehensive income, tax effect	(290)	(980)
Total other comprehensive income, net of tax	$ 537	$ 1,822