Supplemental Comprehensive Income Disclosures - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Supplemental Comprehensive Income Disclosures [Abstract]
Unrealized holding gains on securities arising during the period	$ 19,503	$ 9,030
Reclassification adjustment for gains on securities included in net income	(19)	0
Total unrealized gains on securities	19,484	9,030
Unrealized holding (losses) gains on derivatives arising during the period	(4,581)	133
Unrealized holding gains on securities arising during the period	(4,096)	(1,896)
Reclassification adjustment for gains on derivatives included in net income, before Tax	0	0
Total unrealized gain on derivatives	(4,581)	133
Reclassification adjustment for gains on securities included in net income	4	0
Total other comprehensive (loss) income	14,903	9,163
Other Comprehensive Income (Loss), Securities, Available-for-sale, Tax	(4,092)	(1,896)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	962	(28)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	0	0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Total	962	(28)
Other Comprehensive Income (Loss), Tax	(3,130)	(1,924)
Other comprehensive income (loss) before reclassification adjustment	15,407	7,134
Total unrealized (losses) gains on securities	15,392	7,134
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(3,619)	105
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	0	0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Total	(3,619)	105
Total other comprehensive (loss) income	11,773	7,239
Reclassification adjustment for gains on securities included in net income	$ 15	$ 0