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Loans Receivable, Net - Aging Analysis (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	$ 17,218,518	$ 17,261,849
Accruing loans 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	37,544	25,347
Accruing loans 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	8,914	6,881
Accruing loans 90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	5,289	6,177
Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	84,643	58,850
Non-accrual loans with no ACL	32,539	20,060
Non-accrual loans with ACL	357	385
Current loans receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	17,133,875	17,202,999
Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	1,850,079	1,858,929
Residential real estate | Accruing loans 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	10,862	5,195
Residential real estate | Accruing loans 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	0	404
Residential real estate | Accruing loans 90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	1,956	1,509
Residential real estate | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	19,095	14,033
Non-accrual loans with no ACL	6,202	6,850
Non-accrual loans with ACL	75	75
Residential real estate | Current loans receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	1,830,984	1,844,896
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	10,952,809	10,963,713
Commercial real estate | Accruing loans 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	7,387	8,852
Commercial real estate | Accruing loans 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	1,872	2,792
Commercial real estate | Accruing loans 90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	1,437	2,899
Commercial real estate | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	21,383	22,555
Non-accrual loans with no ACL	10,510	8,012
Non-accrual loans with ACL	177	0
Commercial real estate | Current loans receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	10,931,426	10,941,158
Other commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	3,121,477	3,119,535
Other commercial | Accruing loans 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	10,731	6,261
Other commercial | Accruing loans 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	4,643	1,180
Other commercial | Accruing loans 90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	1,066	985
Other commercial | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	28,642	10,284
Non-accrual loans with no ACL	12,184	1,691
Non-accrual loans with ACL	18	167
Other commercial | Current loans receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	3,092,835	3,109,251
Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	920,132	930,994
Home equity | Accruing loans 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	5,548	1,965
Home equity | Accruing loans 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	1,257	1,699
Home equity | Accruing loans 90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	753	646
Home equity | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	10,257	7,136
Non-accrual loans with no ACL	2,699	2,826
Non-accrual loans with ACL	0	0
Home equity | Current loans receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	909,875	923,858
Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	374,021	388,678
Other consumer | Accruing loans 30-59 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	3,016	3,074
Other consumer | Accruing loans 60-89 days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	1,142	806
Other consumer | Accruing loans 90 days or more past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	77	138
Other consumer | Past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	5,266	4,842
Non-accrual loans with no ACL	944	681
Non-accrual loans with ACL	87	143
Other consumer | Current loans receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable	$ 368,755	$ 383,836

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