Details Of Certain Accounts - Other Non-Current Liabilities (Details) - USD ($) $ in Thousands	1 Months Ended
	Jan. 31, 2016	Sep. 30, 2017	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Investee losses in excess of investment (Note 5)		$ 8,845	$ 10,238
Deferred gain on sale of property		5,910	5,761
Deferred revenue		8,827	8,598
Derivative liability (Note 14)		9,663	20,191
Other		9,491	8,197
Total other non-current liabilities		$ 42,736	$ 52,985
Term of lease agreement	15 years