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Segment Information - Additional Information (Detail)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2016
USD ($)
Segment
Jun. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Segment Reporting Information [Line Items]          
Number of reportable segments | Segment     2    
Revenues $ 1,792,430 $ 1,872,340 $ 3,506,167 $ 3,733,726  
Property and equipment 1,160,870   1,160,870   $ 1,101,959
Foreign Operations [Member]          
Segment Reporting Information [Line Items]          
Revenues 335,600 $ 359,200 688,000 $ 892,700  
Property and equipment $ 334,100   $ 334,100   $ 317,600
Foreign Operations [Member] | Canada [Member]          
Segment Reporting Information [Line Items]          
Percentage of foreign revenues 67.00% 84.00% 73.00% 86.00%