Loans and Allowance for Credit Losses for Loans - Summary of Allocation of Allowance for Loan Losses and Related Loans by Loan Portfolio Segment Disaggregated Based on Allowance Measurement Methodology (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Allowance for loan losses:
Individually evaluated for credit losses	$ 75,855	$ 74,215
Collectively evaluated for credit losses	482,995	371,865
Total	558,850	446,080	$ 458,655
Loans:
Individually evaluated for credit losses	329,702	264,678
Collectively evaluated for credit losses	48,470,009	49,945,617
Total	48,799,711	50,210,295
Commercial and Industrial
Allowance for loan losses:
Individually evaluated for credit losses	59,603	55,993
Collectively evaluated for credit losses	113,399	77,366
Total	173,002	133,359	139,941
Loans:
Individually evaluated for credit losses	131,898	96,827
Collectively evaluated for credit losses	9,799,502	9,133,716
Total	9,931,400	9,230,543
Commercial real estate
Allowance for loan losses:
Individually evaluated for credit losses	16,225	17,987
Collectively evaluated for credit losses	287,923	231,611
Total	304,148	249,598	259,408
Loans:
Individually evaluated for credit losses	172,666	145,419
Collectively evaluated for credit losses	29,472,292	31,824,628
Total	29,644,958	31,970,047
Residential Mortgage
Allowance for loan losses:
Individually evaluated for credit losses	27	235
Collectively evaluated for credit losses	58,868	42,722
Total	58,895	42,957	39,020
Loans:
Individually evaluated for credit losses	23,797	21,843
Collectively evaluated for credit losses	5,608,719	5,547,167
Total	5,632,516	5,569,010
Consumer
Allowance for loan losses:
Individually evaluated for credit losses	0	0
Collectively evaluated for credit losses	22,805	20,166
Total	22,805	20,166	$ 20,286
Loans:
Individually evaluated for credit losses	1,341	589
Collectively evaluated for credit losses	3,589,496	3,440,106
Total	$ 3,590,837	$ 3,440,695