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Income Taxes - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
May 10, 2005
LFCM Holdings [Member]
Provision for income taxes $ 13,053 $ 20,605 $ 32,191 $ 51,704  
Income tax provisions, effective tax rates 27.90% 23.50% 24.90% 20.60%  
U.S. federal statutory rate     35.00%    
Percentage of cash savings to pay per the tax receivable agreement         85.00%