Loans Receivable and Allowance for Credit Losses - Schedule of Activities in Allowance for Loan Losses by Portfolio Segments and Unfunded Credit Commitments (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Allowance for unfunded credit reserves
Allowance for unfunded credit commitments, beginning of period	$ 49,000
Foreign currency translation adjustments	346	$ 23
Allowance for unfunded credit commitments, end of period	47,000
Provision for credit losses on loans, leases and unfunded credit commitments	36,000	49,000
Unfunded Credit Commitments
Allowance for unfunded credit reserves
Allowance for unfunded credit commitments, beginning of period	48,690	39,526
(Reversal of) provision for credit losses on unfunded credit commitments	(1,682)	938
Foreign currency translation adjustments	(3)	0
Allowance for unfunded credit commitments, end of period	47,005	40,464
Loans, Leases and Unfunded Credit Commitments
Allowance for unfunded credit reserves
Provision for credit losses on loans, leases and unfunded credit commitments	$ 36,192	$ 49,000

Amount, excluding accrued interest, of foreign currency translation gain (loss) which decreases (increases) allowance for credit loss on financing receivable. Excludes net investment in lease.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount of expected credit loss for credit exposure on off-balance-sheet commitment, including but not limited to, loan commitment, standby letter of credit, financial guarantee not accounted for as insurance. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging.

+ References

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

+ References

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