Loans Receivable, Net - Collateral-Dependent Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	$ 17,261,849	$ 16,198,082
Residential Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	1,858,929	1,704,544
Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	10,963,713	10,303,306
Other Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	3,119,535	2,901,863
Home Equity
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	930,994	888,013
Other Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	388,678	400,356
Collateral Pledged
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	48,979	43,044
Collateral Pledged | Residential Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	6,925	11,134
Collateral Pledged | Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	25,173	24,921
Collateral Pledged | Other Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	12,932	3,963
Collateral Pledged | Home Equity
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	2,826	1,993
Collateral Pledged | Other Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	1,123	1,033
Business assets
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	11,483	3,236
Business assets | Residential Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	0	0
Business assets | Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	0	6
Business assets | Other Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	11,480	3,230
Business assets | Home Equity
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	0	0
Business assets | Other Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	3	0
Residential Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	14,425	17,578
Residential Real Estate | Residential Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	6,924	11,099
Residential Real Estate | Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	4,107	4,317
Residential Real Estate | Other Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	508	98
Residential Real Estate | Home Equity
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	2,808	1,968
Residential Real Estate | Other Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	78	96
Other real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	22,016	21,635
Other real estate | Residential Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	1	35
Other real estate | Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	21,066	20,598
Other real estate | Other Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	561	620
Other real estate | Home Equity
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	18	25
Other real estate | Other Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	370	357
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	1,055	595
Other | Residential Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	0	0
Other | Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	0	0
Other | Other Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	383	15
Other | Home Equity
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	0	0
Other | Other Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans receivable	$ 672	$ 580