Quarterly report pursuant to Section 13 or 15(d)

Segment Information - Additional Information (Detail)

v2.4.0.8
Segment Information - Additional Information (Detail) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Segment Reporting Information [Line Items]          
Number of reportable segments     3    
Property and equipment $ 1,311,859,000   $ 1,311,859,000   $ 1,205,608,000
Canada [Member]
         
Segment Reporting Information [Line Items]          
Percentage of foreign revenues 75.00% 96.00% 80.00% 97.00%  
Foreign Operations [Member]
         
Segment Reporting Information [Line Items]          
Revenues from foreign operations 392,200,000 208,400,000 848,400,000 505,800,000  
Property and equipment $ 238,200,000   $ 238,200,000   $ 196,800,000