Debt (Tables)

9 Months Ended

Sep. 30, 2016

Debt [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

	September 30, 2016				December 31, 2015
	Long-term		Current		Long-term		Current
Senior Notes due May 2019	$	500,000	$	-	$	500,000	$	-
Senior Notes due December 2021		800,000		-		800,000		-
Term loan		-		-		305,000		20,000
Other		-		-		3,089		9,957
Total debt, gross		1,300,000		-		1,608,089		29,957
Unamortized debt issuance costs		(16,419)		-		(19,826)		-
Total debt, net	$	1,283,581	$	-	$	1,588,263	$	29,957