Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2016

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

Supplemental Cash Flow Information (in thousands)

	Year ended December 31,
	2016		2015		2014
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