Debt (Tables)

3 Months Ended

Mar. 31, 2016

Debt [Abstract]

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

	March 31, 2016				December 31, 2015
	Long-term		Current		Long-term		Current
Revolving credit facility due February 2019	$	325,000	$	-	$	-	$	-
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		2,387		6,028		3,089		9,957
Total debt, gross		1,627,387		6,028		1,608,089		29,957
Unamortized debt issuance costs		(18,812)		-		(19,826)		-
Total debt	$	1,608,575	$	6,028	$	1,588,263	$	29,957