Other Comprehensive (Loss) Income - Summary of the Tax Effects (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income, before tax	$ (3,739)	$ 827
Other Comprehensive Income (Loss), Tax	(785)	290
Unrealized gains and losses on securities available-for-sale:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Change in unrealized gains/losses during period	(4,048)	820
Other Comprehensive Income (Loss) before Reclassifications, Tax	(850)	287
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(3,198)	533
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	0	6
Reclassification from AOCI, Current Period, Tax	0	2
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	4
Gains on derivative instruments:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Change in unrealized gains/losses during period	349	13
Other Comprehensive Income (Loss) before Reclassifications, Tax	73	5
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	276	8
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	(40)	0
Reclassification from AOCI, Current Period, Tax	8	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(32)	0
Total other comprehensive (loss) income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income, before tax	(3,739)	827
Other Comprehensive Income (Loss), Tax	(785)	290
Other Comprehensive Income (Loss), Net of Tax	$ (2,954)	$ 537