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