Loans and Allowance for Credit Losses for Loans - Summary of Provision for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Receivables [Abstract]
Provision for loan losses	$ 38,310	$ 5,810	$ 41,568	$ 14,502
Provision for unfunded credit commitments	5,402	2,967	5,644	3,289
Total provision for credit losses for loans	$ 43,712	$ 8,777	$ 47,212	$ 17,791

Amount of expense (reversal of expense) for expected credit loss for off-balance sheet credit exposure. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration