Income Taxes (Income Tax Expense) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Current income tax expense	$ 49,736	$ 76,928	$ 60,533
Deferred income tax expense (benefit)	3,279	(6,405)	8,167
Income tax expense, as reported	$ 53,015	$ 70,523	$ 68,700