Quarterly report pursuant to Section 13 or 15(d)

Segment Information (Detail)

v3.10.0.1
Segment Information (Detail)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2018
USD ($)
Segment
division
Jun. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
Segment Reporting Information [Line Items]          
Number of reportable segments | Segment     2    
Number of internal divisions | division     2    
Revenues $ 2,656,348 $ 2,200,374 $ 5,073,924 $ 4,378,544  
Property and equipment 1,325,128   1,325,128   $ 1,288,602
Foreign Operations          
Segment Reporting Information [Line Items]          
Revenues 463,000 $ 524,500 1,170,000 $ 1,180,000  
Property and equipment $ 311,200   $ 311,200   $ 330,400
Foreign Operations | Canada          
Segment Reporting Information [Line Items]          
Percentage of foreign revenues 68.00% 80.00% 73.00% 82.00%