Other Assets and Liabilities - Summary of Unfunded Loan Commitment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	$ 173,549	$ 0
Increase (decrease) in CECL reserve	(48,900)
Ending balance	124,679	173,549
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance		17,650
U.S. Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	42,995
Ending balance	26,885	42,995
U.S. Loans | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance		8,955
Non-U.S. Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	27,734
Ending balance	10,263	27,734
Non-U.S. Loans | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance		3,631
CECL reserve on unfunded loan commitments
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	10,031	0
Increase (decrease) in CECL reserve	(3,768)	6,768
Ending balance	6,263	10,031
CECL reserve on unfunded loan commitments | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance		3,263
CECL reserve on unfunded loan commitments | U.S. Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	6,953	0
Increase (decrease) in CECL reserve	(2,881)	4,152
Ending balance	4,072	6,953
CECL reserve on unfunded loan commitments | U.S. Loans | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance		2,801
CECL reserve on unfunded loan commitments | Non-U.S. Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	2,994	0
Increase (decrease) in CECL reserve	(803)	2,541
Ending balance	2,191	2,994
CECL reserve on unfunded loan commitments | Non-U.S. Loans | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance		453
Unique Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	33,159	0
Ending balance	32,657	33,159
Unique Loans | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance		1,356
Unique Loans | CECL reserve on unfunded loan commitments
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	84	0
Increase (decrease) in CECL reserve	(84)	75
Ending balance	0	84
Unique Loans | CECL reserve on unfunded loan commitments | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance		9
Impaired loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	69,661	0
Ending balance	54,874	69,661
Impaired loans | CECL reserve on unfunded loan commitments
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance	0	0
Increase (decrease) in CECL reserve	0	0
Ending balance	$ 0	0
Impaired loans | CECL reserve on unfunded loan commitments | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance		$ 0