Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Tax [Line Items]
Provisions for income tax	$ 21,751	$ 3,948
Effective income tax rates	20.30%	18.30%
U.S. federal statutory income tax rate	35.00%
LFCM Holdings [Member]
Income Tax [Line Items]
Percentage of cash savings required to pay under the tax receivable agreement	85.00%
Tax Receivable Agreement Date	May 10, 2005