Fair Value Disclosures - Summary of Loans Held-for-Sale at Fair Value (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Fairvaluemeasurementsloansheldforsale [Abstract]
Unpaid principal balance on loans held-for-sale	$ 33,200	$ 76,602
Net unrealized gains on loans held-for-sale	922	2,983
Loans held-for-sale at fair value	$ 34,122	$ 79,585

Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant