Reclassification of Accumulated Other Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Supplemental Comprehensive Income Disclosures [Abstract]
Unrealized holding gains on securities arising during the period	$ 5,822	$ 9,873	$ 25,325	$ 18,903
Reclassification adjustment for gains on securities included in net income	(8)	(6)	(27)	(6)
Total unrealized gains on securities	5,814	9,867	25,298	18,897
Unrealized holding (losses) gains on derivatives arising during the period	(536)	0	(5,117)	133
Unrealized holding gains on securities arising during the period	(1,223)	(2,073)	(5,319)	(3,969)
Reclassification adjustment for gains on derivatives included in net income, before Tax	0	0	0	0
Total unrealized gain on derivatives	(536)	0	(5,117)	133
Reclassification adjustment for gains on securities included in net income	2	1	6	1
Total other comprehensive (loss) income	5,278	9,867	20,181	19,030
Other Comprehensive Income (Loss), Securities, Available-for-sale, Tax	(1,221)	(2,072)	(5,313)	(3,968)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	113	0	1,075	(28)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	0	0	0	0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax, Total	113	0	1,075	(28)
Other Comprehensive Income (Loss), Tax	(1,108)	(2,072)	(4,238)	(3,996)
Other comprehensive income (loss) before reclassification adjustment	4,599	7,800	20,006	14,934
Total unrealized (losses) gains on securities	4,593	7,795	19,985	14,929
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(423)	0	(4,042)	105
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	0	0	0	0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Total	(423)	0	(4,042)	105
Total other comprehensive (loss) income	4,170	7,795	15,943	15,034
Reclassification adjustment for gains on securities included in net income	6	5	21	5
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, net	21,522		21,522
Other comprehensive income (loss) before reclassification adjustment	4,599	7,800	20,006	14,934
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(423)	0	(4,042)	105
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	0	0	0	0
Other comprehensive income (loss)	4,170	7,795	15,943	15,034
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Supplemental Comprehensive Income Disclosures [Abstract]
Other comprehensive income (loss) before reclassification adjustment	4,599	7,800	20,006	14,934
Total other comprehensive (loss) income	4,593	7,795	19,985	14,929
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, net	24,565	3,232	24,565	3,232
Other comprehensive income (loss) before reclassification adjustment	4,599	7,800	20,006	14,934
Amounts reclassified from accumulated other comprehensive income (loss)	(6)	(5)	(21)	(5)
Other comprehensive income (loss)	4,593	7,795	19,985	14,929
Accumulated Defined Benefit Plans Adjustment [Member]
Supplemental Comprehensive Income Disclosures [Abstract]
Other comprehensive income (loss) before reclassification adjustment	0	0	0	0
Total other comprehensive (loss) income	0	0	0	0
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, net	365	461	365	461
Other comprehensive income (loss) before reclassification adjustment	0	0	0	0
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0	0
Other comprehensive income (loss)	0	0	0	0
Derivative [Member]
Supplemental Comprehensive Income Disclosures [Abstract]
Total other comprehensive (loss) income	(423)	0	(4,042)	105
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, net	(3,408)	0	(3,408)	0
Other comprehensive income (loss)	(423)	0	(4,042)	105
Accumulated Other Comprehensive Income (Loss), net [Member]
Supplemental Comprehensive Income Disclosures [Abstract]
Total other comprehensive (loss) income	4,170	7,795	15,943	15,034
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, net	21,522	3,693	21,522	3,693
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	4,176	7,800	15,964	15,039
Amounts reclassified from accumulated other comprehensive income (loss)	(6)	(5)	(21)	(5)
Other comprehensive income (loss)	$ 4,170	$ 7,795	$ 15,943	$ 15,034