Quarterly report pursuant to Section 13 or 15(d)

Segment Information - Additional Information (Detail)

v3.2.0.727
Segment Information - Additional Information (Detail)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
Segment
Jun. 30, 2014
USD ($)
Dec. 31, 2014
USD ($)
Segment Reporting Information [Line Items]          
Number of reportable segments | Segment     2    
Property and equipment $ 1,129,597   $ 1,129,597   $ 1,099,574
Canada [Member]          
Segment Reporting Information [Line Items]          
Percentage of foreign revenues 84.00% 75.00% 86.00% 80.00%  
Foreign Operations [Member]          
Segment Reporting Information [Line Items]          
Revenues $ 359,200 $ 392,200 $ 892,700 $ 848,400  
Property and equipment $ 357,500   $ 357,500   $ 372,900