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
	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