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Other Comprehensive Income - Summary of Components of OCI (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Equity [Abstract]
Net change in fair value recorded in accumulated OCI, Before-tax	$ (202,072)	$ (40,391)
Net change in fair value recorded in accumulated OCI, Tax effect	(59,740)	11,941
Net change in fair value recorded in accumulated OCI, After-tax	(142,332)	(28,450)
Amortization of net unrealized losses on securities transferred from available-for-sale to held-to-maturity, Before-tax	54	81
Amortization of net unrealized losses on securities transferred from available-for-sale to held-to-maturity, Tax effect	(16)	(24)
Amortization of net unrealized losses on securities transferred from available-for-sale to held-to-maturity, After-tax	38	57
Net change, Before-tax	(202,018)	(40,310)
Net change, Tax effect	59,724	11,917
Other comprehensive income (loss), net of tax	$ (142,294)	$ (28,393)

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Other comprehensive income (loss) amortization of unrealized gain (loss) on securities transferred from available for sale to held to maturity before tax.

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