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Qualified Affordable Housing Projects and Other Tax Credit Investments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Investment Holdings [Line Items]
Investment	$ 64,371		$ 62,000
Unfunded Commitment	26,571		30,105
Amortization Expense	2,064	$ 6,291
Tax Expense (Benefit) Recognized	(2,843)	(2,775)
LIHTC
Investment Holdings [Line Items]
Investment, Proportional amortization	32,702		33,609
Unfunded Commitment, Proportional amortization	5,899		6,845
Amortization Expense	862	776
Tax Expense (Benefit) Recognized	(1,136)	(1,019)
FHTC
Investment Holdings [Line Items]
Investment, Equity	18,530		18,660
Unfunded Commitment, Equity	20,672		22,398
Amortization Expense	130	5,143
Tax Expense (Benefit) Recognized	(682)	(1,356)
NMTC
Investment Holdings [Line Items]
Investment, Equity	10,425		6,120
Unfunded Commitment, Equity	0		0
Amortization Expense	375
Tax Expense (Benefit) Recognized	(463)
Renewable Energy
Investment Holdings [Line Items]
Investment, Equity	2,714		3,611
Unfunded Commitment, Equity	0		$ 862
Amortization Expense	697	372
Tax Expense (Benefit) Recognized	$ (562)	$ (400)

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Investments in qualified affordable housing projects.

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Amount of affordable housing tax credits and other tax benefits recognized.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 740
-Section 50
-Paragraph 2
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Amount of investment in qualified affordable housing projects.

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