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Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Schedule of Loan Purchases and Sales (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases		$ 137,814	$ 652,176	$ 368,776	$ 1,389,512
Sales		$ 502,201	$ 130,350	$ 536,920	$ 260,851
Purchase price as a percentage of loans outstanding		99.90%	99.20%	98.70%	101.00%
Net gain on sale of loans	$ (23,500)	$ (23,400)	$ 5,800	$ (19,700)	$ 10,100
Proceeds from sales of loans and leases	$ 100,700			136,920	260,851
Loans receivable, PPP
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases		0	602,175	0	1,223,662
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases		15,067	0	170,022	0
Sales		0	14,549	0	42,735
Personal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases		47,778	0	123,785	109,142
Sales		500,001	103,897	500,001	132,715
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchases		74,969	50,001	74,969	56,708
Specialty lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales		2,200	0	2,200	0
Other commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales		0	6,176	22,880	35,166
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales		0	0	2,879	19,443
Commercial real estate owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales		0	5,728	8,960	12,426
Commercial real estate non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Sales		$ 0	$ 0	$ 0	$ 18,366

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Loans Held-for-investment, Purchase Price as a Percentage of Loans Outstanding

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Amount excluding accrued interest, of increase in financing receivable from purchase. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 11
-Subparagraph (h)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919244-210447

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 11
-Subparagraph (i)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919244-210447

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 5
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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (a)
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