XML 59 R47.htm IDEA: XBRL DOCUMENT v3.8.0.1
Supplemental Cash Flow Information (Tables)
 12 Months Ended
Dec. 31, 2016
Supplemental Cash Flow Elements [Abstract]  
Changes in Operating Assets and Liabilities
a)The changes in operating assets and liabilities for the years ended December 31, 2016, 2015, and 2014, are as follows:
 
Year Ended December 31,
 
2016
 
2015
 
2014
Accounts receivable
96,497

 
(6,488
)
 
136,660

Prepaid expenses and other
9,690

 
(10,607
)
 
(1,618
)
Accounts payable
(10,705
)
 
(24,727
)
 
(17,643
)
Accrued liabilities and other
(57,149
)
 
29,531

 
(56,768
)
 
38,333

 
(12,291
)
 
60,631