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Fair Value Measurements - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2013
Dec. 31, 2015
Dec. 31, 2014
Fair Value Disclosures [Abstract]      
Impairment charge $ 14,000    
Remaining fair value of intangible asset $ 99,000    
Estimated fair value of long-term debt, including the current portion   $ 2,150,000 $ 2,180,000
Long-term debt   $ 2,100,000 $ 2,100,000