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Federal, State and Local Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Taxes [Line Items] |  |  |  |
Federal corporate income tax rate | 21.00% | 35.00% | 35.00% |
Income tax benefit due to change in tax rate |  | $ 42,000 |  |
Outstanding amount of the investment | $ 62,300 | 46,200 |  |
Other commitments of additional anticipated equity contributions relating to current investments | 37,200 | 23,900 |  |
Affordable housing tax credits and other tax benefits recognized | 5,200 | 4,500 | $ 4,000 |
Affordable housing tax credits and other tax benefits, related amortization recognized | 4,700 | 3,100 | 3,000 |
Unrecognized gross tax benefits | 33,357 | 33,681 | 33,487 | $ 30,456
Total amount of net unrecognized tax benefits that would affect the effective tax rate, if recognized | 26,400 |  |  |
Income tax benefit attributed to interest and penalties | 1,700 | 1,800 | 1,200 |
Accrued interest and penalties on tax liabilities | 11,300 | 8,900 |  |
Net deferred tax liabilities | 79,110 | 84,797 |  |
Tax expense | 135,252 | $ 202,014 | $ 281,727 |
Maximum |  |  |  |
Income Taxes [Line Items] |  |  |  |
Estimated change in balance of unrecognized tax benefit, within next twelve months | 20,000 |  |  |
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 income tax expense (benefit) for remeasurement of deferred tax from change in tax rate pursuant to Tax Cuts and Jobs Act of 2017. + 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=114775393&loc=SL49122993-202985 + Details
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- Definition The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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