Goodwill and Other Intangible Assets - Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill
Gross Carrying Amount	$ 36,850	$ 62,960
Accumulated Amortization	(18,459)	(40,487)
Total	18,391	22,473
Decrease in Intangible asset	26,100
Decrease in Accumulated amortization	26,100
Intangible amortization expense	4,081	4,638	$ 5,623
Identifiable customer intangibles
Goodwill
Gross Carrying Amount	31,857	55,744
Accumulated Amortization	(14,287)	(34,972)
Total	17,570	20,772
Core deposit intangible assets
Goodwill
Gross Carrying Amount	4,993	7,216
Accumulated Amortization	(4,172)	(5,515)
Total	$ 821	$ 1,701