Loans and Allowance for Credit Losses - Schedule of Shows the Age Analysis of Past Due Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Total	$ 17,778,354	$ 13,948,360
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	60,210	30,936
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	17,350	9,370
90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Total	32,440	16,824
Total Past Due
Financing Receivable, Past Due [Line Items]
Total	110,000	57,130
Current
Financing Receivable, Past Due [Line Items]
Total	17,668,354	13,891,230
Commercial Portfolio Segment | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	3,266,575	3,019,631
Commercial Portfolio Segment | Commercial and industrial | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	28	3,316
Commercial Portfolio Segment | Commercial and industrial | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	0	0
Commercial Portfolio Segment | Commercial and industrial | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Total	90	465
Commercial Portfolio Segment | Commercial and industrial | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	118	3,781
Commercial Portfolio Segment | Commercial and industrial | Current
Financing Receivable, Past Due [Line Items]
Total	3,266,457	3,015,850
Commercial Portfolio Segment | Commercial real estate
Financing Receivable, Past Due [Line Items]
Total	7,044,078	5,453,847
Commercial Portfolio Segment | Commercial real estate | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	17,081	0
Commercial Portfolio Segment | Commercial real estate | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	6,432	0
Commercial Portfolio Segment | Commercial real estate | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Total	9,180	0
Commercial Portfolio Segment | Commercial real estate | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	32,693	0
Commercial Portfolio Segment | Commercial real estate | Current
Financing Receivable, Past Due [Line Items]
Total	7,011,385	5,453,847
Commercial Portfolio Segment | Commercial construction
Financing Receivable, Past Due [Line Items]
Total	491,649	384,637
Commercial Portfolio Segment | Commercial construction | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	0	0
Commercial Portfolio Segment | Commercial construction | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	0	0
Commercial Portfolio Segment | Commercial construction | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Total	0	0
Commercial Portfolio Segment | Commercial construction | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	0	0
Commercial Portfolio Segment | Commercial construction | Current
Financing Receivable, Past Due [Line Items]
Total	491,649	384,637
Commercial Portfolio Segment | Business banking
Financing Receivable, Past Due [Line Items]
Total	1,435,203	1,089,593
Commercial Portfolio Segment | Business banking | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	13,680	3,455
Commercial Portfolio Segment | Business banking | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	1,605	1,647
Commercial Portfolio Segment | Business banking | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Total	1,826	1,202
Commercial Portfolio Segment | Business banking | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	17,111	6,304
Commercial Portfolio Segment | Business banking | Current
Financing Receivable, Past Due [Line Items]
Total	1,418,092	1,083,289
Residential Portfolio Segment | Residential real estate
Financing Receivable, Past Due [Line Items]
Total	3,928,382	2,582,465
Residential Portfolio Segment | Residential real estate | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	21,037	17,116
Residential Portfolio Segment | Residential real estate | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	6,947	4,888
Residential Portfolio Segment | Residential real estate | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Total	12,786	6,764
Residential Portfolio Segment | Residential real estate | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	40,770	28,768
Residential Portfolio Segment | Residential real estate | Current
Financing Receivable, Past Due [Line Items]
Total	3,887,612	2,553,697
Consumer Portfolio Segment | Consumer home equity
Financing Receivable, Past Due [Line Items]
Total	1,385,288	1,211,168
Consumer Portfolio Segment | Consumer home equity | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	7,254	6,517
Consumer Portfolio Segment | Consumer home equity | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	2,195	2,600
Consumer Portfolio Segment | Consumer home equity | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Total	8,449	8,204
Consumer Portfolio Segment | Consumer home equity | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	17,898	17,321
Consumer Portfolio Segment | Consumer home equity | Current
Financing Receivable, Past Due [Line Items]
Total	1,367,390	1,193,847
Consumer Portfolio Segment | Other Consumer
Financing Receivable, Past Due [Line Items]
Total	227,179	207,019
Consumer Portfolio Segment | Other Consumer | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	1,130	532
Consumer Portfolio Segment | Other Consumer | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total	171	235
Consumer Portfolio Segment | Other Consumer | 90 or More Days Past Due
Financing Receivable, Past Due [Line Items]
Total	109	189
Consumer Portfolio Segment | Other Consumer | Total Past Due
Financing Receivable, Past Due [Line Items]
Total	1,410	956
Consumer Portfolio Segment | Other Consumer | Current
Financing Receivable, Past Due [Line Items]
Total	$ 225,769	$ 206,063