Loans and Allowance for Credit Losses for Loans - Summary of Activity in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Allowance for loan losses:
Beginning balance	$ 458,655	$ 359,202
Allowance for PCD loans		70,319
Loans charged-off	(75,453)	(41,896)
Charged-off loans recovered	13,491	22,794
Net (charge-offs) recoveries	(61,962)	(19,102)
Provision for loan losses	50,755	48,236
Ending balance	446,080	458,655
Allowance for PCD loans reclassification	62,400
Cumulative Effect, Period of Adoption, Adjustment
Allowance for loan losses:
Beginning balance	(1,368)
Ending balance		(1,368)
Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for loan losses:
Beginning balance	457,287	429,521
Ending balance		457,287
Commercial and Industrial
Allowance for loan losses:
Beginning balance	139,941	103,090
Allowance for PCD loans		33,452
Loans charged-off	(48,015)	(33,250)
Charged-off loans recovered	11,270	17,081
Net (charge-offs) recoveries	(36,745)	(16,169)
Provision for loan losses	30,902	19,568
Ending balance	133,359	139,941
Commercial and Industrial \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for loan losses:
Beginning balance	(739)
Ending balance		(739)
Commercial and Industrial \| Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for loan losses:
Beginning balance	139,202	136,542
Ending balance		139,202
Commercial real estate
Allowance for loan losses:
Beginning balance	259,408	217,490
Allowance for PCD loans		36,618
Loans charged-off	(22,946)	(4,561)
Charged-off loans recovered	34	2,073
Net (charge-offs) recoveries	(22,912)	(2,488)
Provision for loan losses	13,691	7,788
Ending balance	249,598	259,408
Commercial real estate \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for loan losses:
Beginning balance	(589)
Ending balance		(589)
Commercial real estate \| Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for loan losses:
Beginning balance	258,819	254,108
Ending balance		258,819
Residential Mortgage
Allowance for loan losses:
Beginning balance	39,020	25,120
Allowance for PCD loans		206
Loans charged-off	(194)	(28)
Charged-off loans recovered	201	711
Net (charge-offs) recoveries	7	683
Provision for loan losses	3,942	13,011
Ending balance	42,957	39,020
Residential Mortgage \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for loan losses:
Beginning balance	(12)
Ending balance		(12)
Residential Mortgage \| Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for loan losses:
Beginning balance	39,008	25,326
Ending balance		39,008
Home equity
Allowance for loan losses:
Beginning balance	20,286	13,502
Allowance for PCD loans		43
Loans charged-off	(4,298)	(4,057)
Charged-off loans recovered	1,986	2,929
Net (charge-offs) recoveries	(2,312)	(1,128)
Provision for loan losses	2,220	7,869
Ending balance	20,166	20,286
Home equity \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for loan losses:
Beginning balance	(28)
Ending balance		(28)
Home equity \| Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for loan losses:
Beginning balance	$ 20,258	13,545
Ending balance		$ 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
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Section 50
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-Publisher FASB
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-6

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-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
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