Other Assets and Liabilities - Summary of Components of Other Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Accrued interest receivable	$ 86,101	$ 66,757
Debt securities held-to-maturity	78,083	77,445
CECL reserve	(70)	(1,723)	$ 0
Debt securities held-to-maturity, net	78,013	75,722
Loan portfolio payments held by servicer	77,624	73,224
Derivative assets	30,531	522
Prepaid expenses	956	973
Collateral deposited under derivative agreements	0	51,050
Prepaid taxes	0	376
Other	572	1,195
Total	$ 273,797	$ 269,819