Supplemental Cash Flow Information (Details) - Supplemental Cash Flow Information - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Supplemental Cash Flow Information [Abstract]
Amount paid for interest	$ 44,063	$ 54,763	$ 31,413
Amount paid for income taxes, net	132,695	34,404	6,294
Non-cash conversion of convertible notes to common shares	43,215	44,310	32,475
Capital expenditures	$ 12,391	$ 5,074	$ 1,737