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Fair Value - Summary of Change in MSR Assets (Detail) - MSR Assets [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Servicing Assets At Amortized Value [Line Items]
Additions	$ 7,539
Write-offs	(61)
Amortization	(391)
Impairments	(3)
Fair value adjustments	207
Balance, December 31, 2020 - Fair value	7,291
Balance, December 31, 2020 - Amortized cost	$ 7,084

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Amount of other-than-temporary impairment (OTTI) applied to contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

+ References

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