Loans and Allowance for Credit Losses for Loans - Summary of Activity in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Allowance for loan losses:
Beginning balance	$ 469,248	$ 436,898	$ 446,080	$ 458,655	$ 458,655
Loans charged-off	(38,339)	(11,327)	(63,239)	(43,900)
Charged-off loans recovered	1,500	2,702	2,845	4,907
Net (charge-offs) recoveries	(36,839)	(8,625)	(60,394)	(38,993)
Provision for loan losses	86,901	8,159	133,624	18,138
Ending balance	519,310	436,432	519,310	436,432	446,080
Cumulative Effect, Period of Adoption, Adjustment
Allowance for loan losses:
Beginning balance				(1,368)	(1,368)
Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for loan losses:
Beginning balance				457,287	457,287
Commercial and industrial
Allowance for loan losses:
Beginning balance	138,593	127,992	133,359	139,941	139,941
Loans charged-off	(14,721)	(3,865)	(29,014)	(29,912)
Charged-off loans recovered	742	2,173	1,424	3,572
Net (charge-offs) recoveries	(13,979)	(1,692)	(27,590)	(26,340)
Provision for loan losses	24,629	1,945	43,474	15,383
Ending balance	149,243	128,245	149,243	128,245	133,359
Commercial and industrial \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for loan losses:
Beginning balance				(739)	(739)
Commercial and industrial \| Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for loan losses:
Beginning balance				139,202	139,202
Commercial Real Estate
Allowance for loan losses:
Beginning balance	265,847	243,332	249,598	259,408	259,408
Loans charged-off	(22,356)	(6,273)	(31,154)	(11,971)
Charged-off loans recovered	150	4	391	28
Net (charge-offs) recoveries	(22,206)	(6,269)	(30,763)	(11,943)
Provision for loan losses	57,452	2,632	82,258	(7,181)
Ending balance	301,093	239,695	301,093	239,695	249,598
Commercial Real Estate \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for loan losses:
Beginning balance				(589)	(589)
Commercial Real Estate \| Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for loan losses:
Beginning balance				258,819	258,819
Residential Mortgage
Allowance for loan losses:
Beginning balance	44,377	41,708	42,957	39,020	39,020
Loans charged-off	0	(149)	0	(149)
Charged-off loans recovered	5	135	30	156
Net (charge-offs) recoveries	5	(14)	30	7
Provision for loan losses	3,315	2,459	4,710	5,138
Ending balance	47,697	44,153	47,697	44,153	42,957
Residential Mortgage \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for loan losses:
Beginning balance				(12)	(12)
Residential Mortgage \| Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for loan losses:
Beginning balance				39,008	39,008
Consumer loans
Allowance for loan losses:
Beginning balance	20,431	23,866	20,166	20,286	20,286
Loans charged-off	(1,262)	(1,040)	(3,071)	(1,868)
Charged-off loans recovered	603	390	1,000	1,151
Net (charge-offs) recoveries	(659)	(650)	(2,071)	(717)
Provision for loan losses	1,505	1,123	3,182	4,798
Ending balance	$ 21,277	$ 24,339	$ 21,277	24,339	20,166
Consumer loans \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for loan losses:
Beginning balance				(28)	(28)
Consumer loans \| Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for loan losses:
Beginning balance				$ 20,258	$ 20,258

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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