Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Minimum	Dec. 31, 2013 Maximum
Income Tax Disclosure [Line Items]
Income taxes payable	$ 448,000	$ 400,000
Income tax examination, period			4 years	5 years