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Qualified Affordable Housing Projects and Other Tax Credit Investments (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Investment Holdings [Line Items] |  |  |
Investment | $ 62,000 | $ 59,661 |
Unfunded Commitment | 30,105 | 25,926 |
Amortization Expense | 21,893 | 5,917 | $ 25,534
Tax Expense (Benefit) Recognized | (24,875) | (7,086) | (29,377)
LIHTC |  |  |
Investment Holdings [Line Items] |  |  |
Investment, Proportional amortization | 33,609 | 29,735 |
Unfunded commitment, Proportional amortization | 6,845 | 3,911 |
Amortization Expense | 3,105 | 3,168 | 2,585
Tax Expense (Benefit) Recognized | (4,071) | (4,102) | (3,349)
FHTC |  |  |
Investment Holdings [Line Items] |  |  |
Investment, Equity | 18,660 | 22,403 |
Unfunded commitment, Equity | 22,398 | 17,886 |
Amortization Expense | 13,237 | 1,113 | 9,206
Tax Expense (Benefit) Recognized | (15,582) | (1,244) | (10,775)
New Markets Tax Credit |  |  |
Investment Holdings [Line Items] |  |  |
Investment, Proportional amortization | 6,120 | 0 |
Unfunded commitment, Proportional amortization | 0 | 0 |
Amortization Expense | 900 |  |
Tax Expense (Benefit) Recognized | (1,100) |  |
Renewable Energy |  |  |
Investment Holdings [Line Items] |  |  |
Investment, Equity | 3,611 | 7,523 |
Unfunded commitment, Equity | 862 | 4,129 |
Amortization Expense | 4,651 | 1,623 | 13,056
Tax Expense (Benefit) Recognized | $ (4,122) | (1,740) | (14,566)
CReED |  |  |
Investment Holdings [Line Items] |  |  |
Amortization Expense |  | 13 | 687
Tax Expense (Benefit) Recognized |  | $ 0 | $ (687)

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- Definition Amortization method qualified affordable housing project investments commitment. + References No definition available. + Details
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- Definition Equity method investment qualified affordable housing project investments. + References No definition available. + Details
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- Definition Equity method qualified affordable housing project investments commitment. + References No definition available. + Details
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- Definition Investments in qualified affordable housing projects. + References No definition available. + Details
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- Definition Amount of affordable housing tax credits and other tax benefits recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 740 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116633289&loc=SL49122993-202985 + Details
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- Definition Amount of investment in qualified affordable housing projects. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 740 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116633289&loc=SL49122993-202985 + Details
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- Definition Amount of amortization expense of investment in qualified affordable housing projects. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 740 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116633289&loc=SL49122993-202985 + Details
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- Definition Amount of commitment or contingent commitments to qualified affordable housing project investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 740 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=116633289&loc=SL49122993-202985 + Details
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