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Loans and Allowance for Loan Losses - Schedule of Rollforward of Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Allowance for loan losses:
Beginning balance	$ 486,845	$ 479,385	$ 479,385
Charge-offs	(27,147)	(50,568)	(160,948)
Recoveries	5,781	6,212
Provision for (reversal of) loan losses	12,728	57,632
Ending balance	478,207	492,661	486,845
Commercial & Industrial
Allowance for loan losses:
Beginning balance	210,525	218,970	218,970
Charge-offs	(10,354)	(37,943)
Recoveries	2,970	3,288
Provision for (reversal of) loan losses	2,762	29,167
Ending balance	205,903	213,482	210,525
Commercial Real Estate
Allowance for loan losses:
Beginning balance	134,021	133,758	133,758
Charge-offs	(9,425)	(3,711)
Recoveries	51	767
Provision for (reversal of) loan losses	1,573	21,813
Ending balance	126,220	152,627	134,021
Total consumer
Allowance for loan losses:
Beginning balance	142,299	126,657	126,657
Charge-offs	(7,368)	(8,914)
Recoveries	2,760	2,157
Provision for (reversal of) loan losses	8,393	6,652
Ending balance	$ 146,084	$ 126,552	$ 142,299

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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

+ References

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

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

+ 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

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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-Topic 230
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-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
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