XML 56 R44.htm IDEA: XBRL DOCUMENT v3.8.0.1
Other Assets and Accrued Liabilities - Long-Term Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Jan. 01, 2018
Dec. 31, 2017
Other Liabilities Disclosure [Abstract]      
Non-current portion of deferred revenues $ 12,523   $ 14,030
Other 1,264   1,263
Other liabilities $ 13,787 $ 14,093 $ 15,293