Supplemental Comprehensive Income Disclosures (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Supplemental Comprehensive Income Disclosures [Abstract]
Unrealized holding gains on securities arising during the period	$ 9,873	$ 660	$ 18,903	$ (3,322)
Reclassification adjustment for gains on securities included in net income	(6)	(5,262)	(6)	(8,102)
Total unrealized gains on securities	9,867	(4,602)	18,897	(11,424)
Unrealized holding gains (losses) on derivatives arising during the period	0	97	133	(33)
Unrealized holding gains on securities arising during the period	(2,073)	(139)	(3,969)	698
Reclassification adjustment for gains on derivatives included in net income, before Tax	0	10	0	10
Total unrealized gain on derivatives	0	107	133	(23)
Reclassification adjustment for gains on securities included in net income	1	1,105	1	1,701
Total other comprehensive (loss) income	9,867	(4,495)	19,030	(11,447)
Other Comprehensive Income (Loss), Securities, Available-for-sale, Tax	(2,072)	966	(3,968)	2,399
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	0	(20)	(28)	7
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	0	(3)	0	(3)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Total	0	(23)	(28)	4
Other Comprehensive Income (Loss), Tax	(2,072)	943	(3,996)	2,403
Other comprehensive income (loss) before reclassification adjustment	7,800	521	14,934	(2,624)
Total unrealized (losses) gains on securities	7,795	(3,636)	14,929	(9,025)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	0	77	105	(26)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	0	(7)	0	(7)
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Total	0	84	105	(19)
Total other comprehensive (loss) income	7,795	(3,552)	15,034	(9,044)
Reclassification adjustment for gains on securities included in net income	$ 5	$ 4,157	$ 5	$ 6,401