XML 162 R115.htm IDEA: XBRL DOCUMENT v3.8.0.1
Financial Instruments by Category - Summary of Carrying Value and Fair Value of Financial Instruments (Detail) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Financial Assets - Available-for-sale      
Marketable securities $ 5,010 $ 28,327  
Financial Assets - Loans and receivables      
Cash and cash equivalents 479,501 883,171 $ 288,189
Term deposit 5,508 5,292  
Restricted cash 310 240  
Accounts receivable and other 33,627 32,159  
Other assets 17,517 1,810  
Financial Liabilities at amortized cost      
Accounts payable and accrued liabilities 110,651 90,705  
Debt 593,783 591,589  
Fair value [member]      
Financial Assets - Available-for-sale      
Marketable securities 5,010 28,327  
Financial Assets - Loans and receivables      
Cash and cash equivalents 479,501 883,171  
Term deposit 5,508 5,292  
Restricted cash 310 240  
Accounts receivable and other 33,627 32,159  
Other assets 17,517 1,810  
Financial Liabilities at amortized cost      
Accounts payable and accrued liabilities 110,651 90,705  
Debt $ 595,698 $ 609,000