Income Tax Expense (Benefit) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Line Items]
Federal - current	$ 205,985	$ 206,748	$ 186,936
State and local - current	40,417	30,070	41,000
Total current	246,402	236,818	227,936
Federal - deferred	20,734	34,275	28,672
State and local - deferred	4,443	8,710	(2,068)
Total deferred	25,177	42,985	26,604
Total income tax expense	271,579	279,803	254,540
Securities available-for-sale	(8,343)	7,672	7,805
Employee stock plans	(1,692)	(589)	(2,679)
Pension liability adjustments	(20,116)	(807)	(14,993)
Non-credit portion of OTTI losses	5,028	65	4,857
Total income taxes	$ 286,688	$ 286,144	$ 249,530