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Income Taxes - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Income Tax Disclosure [Abstract]        
Effective Income Tax Rate Reconciliation, Percent 35.00% 29.00% 35.00% 1.00%
Benefit for noncontrolling interests     1.00% 4.00%
Unrecognized Tax Benefits from Lapse of Statute of Limitations   $ 6,326   $ 6,326
Effective Income Tax Rate Reconciliation State Rate Change Due To Previously Unrecognized Tax Benefit   33.00%   33.00%