Goodwill and Other Intangible Assets - Components of Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 41,310		$ 44,185
Accumulated amortization	(30,231)		(32,801)
Net carrying amount	11,079		11,384
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	6,788		6,788
Accumulated amortization	(6,244)		(5,939)
Net carrying amount	544		849
Customer Related Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	4,162		8,493
Accumulated amortization	(2,548)		(6,530)
Net carrying amount	1,614		1,963
Servicing Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	30,360		28,904
Accumulated amortization	(21,439)		(20,332)
Net carrying amount	8,921		8,572
Valuation allowance included in accumulated amortization	$ 12	$ 8	$ 5	$ 1	$ 3	$ 13