Loans Receivable and Allowance for Credit Losses - Allowance for Loans, by Portfolio Segment and Evaluation Method (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Loans by Portfolio Segment and Impairment Method [Abstract]
Individually evaluated loans	$ 66,149	$ 106,633
ACL on individually evaluated loans	$ 3,856	$ 5,115
Individually evaluated loans ACL coverage	5.83%	4.80%
Collectively evaluated loans	$ 15,337,391	$ 13,846,110
ACL on collectively evaluated loans	$ 158,503	$ 135,435
Collectively evaluated loans ACL coverage	1.03%	0.98%
Total loans	$ 15,403,540	$ 13,952,743
Allowance for credit losses on loans receivable	$ 162,359	$ 140,550	$ 206,741	$ 94,144
Total ACL to total loans	1.05%	1.01%
Real estate loans
Loans by Portfolio Segment and Impairment Method [Abstract]
Individually evaluated loans	$ 43,461	$ 83,347
ACL on individually evaluated loans	870	2,025
Collectively evaluated loans	9,371,119	9,022,584
ACL on collectively evaluated loans	95,014	106,415
Total loans	9,414,580	9,105,931
Allowance for credit losses on loans receivable	95,884	108,440	162,196	53,593
Commercial business
Loans by Portfolio Segment and Impairment Method [Abstract]
Individually evaluated loans	12,477	19,407
ACL on individually evaluated loans	$ 2,941	$ 3,056
Individually evaluated loans ACL coverage	23.57%	15.75%
Collectively evaluated loans	$ 5,097,055	$ 4,189,267
ACL on collectively evaluated loans	$ 53,931	$ 24,755
Collectively evaluated loans ACL coverage	1.06%	0.59%
Total loans	$ 5,109,532	$ 4,208,674
Allowance for credit losses on loans receivable	$ 56,872	$ 27,811	39,155	33,032
Total ACL to total loans	1.11%	0.66%
Residential Portfolio Segment
Loans by Portfolio Segment and Impairment Method [Abstract]
Individually evaluated loans	$ 9,775	$ 3,470
ACL on individually evaluated loans	$ 24	$ 11
Individually evaluated loans ACL coverage	0.25%	0.32%
Collectively evaluated loans	$ 836,305	$ 576,156
ACL on collectively evaluated loans	$ 8,896	$ 3,305
Collectively evaluated loans ACL coverage	1.06%	0.57%
Total loans	$ 846,080	$ 579,626
Allowance for credit losses on loans receivable	$ 8,920	$ 3,316	4,227	5,925
Total ACL to total loans	1.05%	0.57%
Consumer
Loans by Portfolio Segment and Impairment Method [Abstract]
Individually evaluated loans	$ 436	$ 409
ACL on individually evaluated loans	$ 21	$ 23
Individually evaluated loans ACL coverage	4.82%	5.62%
Collectively evaluated loans	$ 32,912	$ 58,103
ACL on collectively evaluated loans	$ 662	$ 960
Collectively evaluated loans ACL coverage	2.01%	1.65%
Total loans	$ 33,348	$ 58,512
Allowance for credit losses on loans receivable	$ 683	$ 983	$ 1,163	$ 1,594
Total ACL to total loans	2.05%	1.68%
Residential \| Real estate loans
Loans by Portfolio Segment and Impairment Method [Abstract]
Individually evaluated loans	$ 0	$ 0
ACL on individually evaluated loans	0	0
Collectively evaluated loans	76,045	69,199
ACL on collectively evaluated loans	$ 1,014	$ 729
Collectively evaluated loans ACL coverage	1.33%	1.05%
Total loans	$ 76,045	$ 69,199
Allowance for credit losses on loans receivable	$ 1,014	$ 729
Total ACL to total loans	1.33%	1.05%
Commercial \| Real estate loans
Loans by Portfolio Segment and Impairment Method [Abstract]
Individually evaluated loans	$ 43,461	$ 83,347
ACL on individually evaluated loans	$ 870	$ 2,025
Individually evaluated loans ACL coverage	2.00%	2.43%
Collectively evaluated loans	$ 9,127,323	$ 8,732,733
ACL on collectively evaluated loans	$ 92,947	$ 104,145
Collectively evaluated loans ACL coverage	1.02%	1.19%
Total loans	$ 9,170,784	$ 8,816,080
Allowance for credit losses on loans receivable	$ 93,817	$ 106,170
Total ACL to total loans	1.02%	1.20%
Construction \| Real estate loans
Loans by Portfolio Segment and Impairment Method [Abstract]
Individually evaluated loans	$ 0	$ 0
ACL on individually evaluated loans	0	0
Collectively evaluated loans	167,751	220,652
ACL on collectively evaluated loans	$ 1,053	$ 1,541
Collectively evaluated loans ACL coverage	0.63%	0.70%
Total loans	$ 167,751	$ 220,652
Allowance for credit losses on loans receivable	$ 1,053	$ 1,541
Total ACL to total loans	0.63%	0.70%

Financing Receivable, Allowance For Credit Loss, Collectively Evaluated For Impairment, Coverage Ratio

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Financing Receivable, Allowance For Credit Loss, Coverage Ratio To Total Loans

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Financing Receivable, Allowance For Credit Loss, Individually Evaluated For Impairment, Coverage Ratio

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Loans by Portfolio Segment and Impairment Method [Abstract]

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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The balance of financing receivables that were collectively evaluated for impairment.

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Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
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The balance of financing receivables that were individually evaluated for impairment.

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