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Components of Income Tax Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Components Of Income Tax Expense Benefit [Line Items]
U.S. Federal	$ 62,616	$ 50,919	$ 50,197
State	9,234	6,245	6,338
Foreign	5,810	5,478	315
Income tax expense	77,660	62,642	56,850
Current	69,071	55,918	48,540
Deferred	8,589	6,724	8,310
Income tax expense	$ 77,660	$ 62,642	$ 56,850

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.