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Loans Receivable and Allowance for Credit Losses - Summary of Activities in Allowance for loan losses by Portfolio Segments and Unfunded Credit Commitments (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Financing Receivable, Allowance for Credit Losses |  |  |  |
Accounting Standards Update [Extensible List] |  |  |  | Accounting Standards Update 2016-13
Provision for (reversal of) credit losses | $ 74,767 | $ (28,954) | $ 198,691 |
Allowance for unfunded credit reserves |  |  |  |
Allowance for unfunded credit commitments, beginning of period | 27,500 |  |  |
(Reversal of) provision for credit losses | 73,500 | (35,000) | 210,653 |
Allowance for unfunded credit commitments, end of period | 26,200 | 27,500 |  |
Unfunded Loan Commitment |  |  |  |
Allowance for unfunded credit reserves |  |  |  |
Allowance for unfunded credit commitments, beginning of period | 27,514 | 33,577 | 11,158 |
(Reversal of) provision for credit losses | (1,267) | (6,046) | 11,962 |
Foreign currency translation adjustments | 17 | (17) | 0 |
Allowance for unfunded credit commitments, end of period | 26,264 | 27,514 | 33,577 | $ 11,158
Cumulative Effect, Period of Adoption, Adjustment |  |  |  |
Allowance for unfunded credit reserves |  |  |  |
Allowance for unfunded credit commitments, beginning of period | $ 0 | 0 | 10,457 |
Allowance for unfunded credit commitments, end of period |  | $ 0 | $ 0 | $ 10,457

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