Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment - Additional Information (Detail)

v3.7.0.1
Property and Equipment - Additional Information (Detail) - USD ($)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Property Plant And Equipment [Abstract]    
Capital expenditures $ 75,700,000 $ 41,400,000
Asset impairment charges $ 510,000 $ 0