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Federal, State and Local Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Taxes [Line Items] |  |  |  |
Income tax benefit due to change in tax rate |  |  | $ 42,000 |
Outstanding amount of the investment | $ 57,100 | $ 62,300 |  |
Other commitments of additional anticipated equity contributions relating to current investments | 29,100 | 37,200 |  |
Affordable housing tax credits and other tax benefits recognized | 5,900 | 5,200 | 4,500 |
Affordable housing tax credits and other tax benefits, related amortization recognized | 5,200 | 4,700 | 3,100 |
Unrecognized gross tax benefits | 35,749 | 33,357 | 33,681 | $ 33,487
Total amount of net unrecognized tax benefits that would affect the effective tax rate, if recognized | 28,200 |  |  |
Income tax benefit attributed to interest and penalties | 2,500 | 1,700 | 1,800 |
Accrued interest and penalties on tax liabilities | 14,500 | 11,300 |  |
Net deferred tax liabilities | 201,431 | 79,110 |  |
Tax expense | 128,264 | 135,252 | $ 202,014 |
Domestic Tax Authority |  |  |  |
Income Taxes [Line Items] |  |  |  |
Net operating loss carryforward | 94,000 |  |  |
Maximum |  |  |  |
Income Taxes [Line Items] |  |  |  |
Estimated change in balance of unrecognized tax benefit, within next twelve months | 21,000 |  |  |
New Jersey Division of Taxation [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Tax expense |  | $ 2,100 |  |
Special Federal Tax Provision |  |  |  |
Income Taxes [Line Items] |  |  |  |
Tax bad debt base-year reserves | 61,500 |  |  |
Net deferred tax liabilities | $ 12,900 |  |  |

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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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