Allowance for Credit Losses - Activity in allowance for credit losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 47,087	$ 38,334	$ 46,732	$ 39,767	$ 39,767
PCD ACL on acquired loans		3,006		3,006
Provision for credit losses	1,950	9,400	5,850	14,166
Loans charged -off	(3,226)	(6,936)	(9,395)	(16,219)
Recoveries	1,600	2,365	4,224	5,449
Ending Balance	47,411	46,169	47,411	46,169	46,732
Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	16,408	12,015	16,963	13,264	13,264
PCD ACL on acquired loans		3,006		3,006
Provision for credit losses	1,584	4,246	1,339	6,328
Loans charged -off	(364)	(3,800)	(1,063)	(7,579)
Recoveries	248	1,197	637	1,645
Ending Balance	17,876	16,664	17,876	16,664	16,963
Residential
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	17,795	14,324	17,470	14,327	14,327
Provision for credit losses	(787)	2,766	(507)	2,686
Loans charged -off	(8)	(58)	(125)	(114)
Recoveries	74	93	236	226
Ending Balance	17,074	17,125	17,074	17,125	17,470
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	12,559	11,986	12,046	11,797	11,797
Provision for credit losses	1,100	2,113	4,893	5,247
Loans charged -off	(2,854)	(3,078)	(8,207)	(8,526)
Recoveries	1,278	1,075	3,351	3,578
Ending Balance	12,083	12,096	12,083	12,096	12,046
Unallocated
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	325	9	253	379	379
PCD ACL on acquired loans				0
Provision for credit losses	53	275	125	(95)
Ending Balance	$ 378	$ 284	$ 378	$ 284	$ 253