Goodwill and Other Intangible Assets - Amortization (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Goodwill
Gross Carrying Amount	$ 35,650		$ 35,650		$ 36,850
Accumulated Amortization	(20,229)		(20,229)		(18,459)
Total	15,421		15,421		18,391
Intangible amortization expense	990	$ 990	2,971	$ 3,091
Goodwill, Impairment Loss			0
Identifiable customer intangibles
Goodwill
Gross Carrying Amount	31,857		31,857		31,857
Accumulated Amortization	(16,689)		(16,689)		(14,287)
Total	15,168		15,168		17,570
Core deposit intangible assets
Goodwill
Gross Carrying Amount	3,793		3,793		4,993
Accumulated Amortization	(3,540)		(3,540)		(4,172)
Total	$ 253		$ 253		$ 821