Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Intangible Assets
Gross Carrying amount	$ 27,693	$ 27,693
Accumulated Amortization	(13,270)	(11,029)
Total	14,423	16,664
Core deposit
Other Intangible Assets
Gross Carrying amount	25,023	25,023
Accumulated Amortization	(11,274)	(9,153)
Total	13,749	15,870
Below/ (Above) market-value lease
Other Intangible Assets
Total	87
Below market-value lease
Other Intangible Assets
Gross Carrying amount	770	770
Accumulated Amortization	(683)	(705)
Total	87	65
Customer relationship and brokered relationship
Other Intangible Assets
Gross Carrying amount	1,900	1,900
Accumulated Amortization	(1,313)	(1,171)
Total	$ 587	$ 729