Debt Obligations (Tables)

9 Months Ended

Sep. 30, 2018

DEBT OBLIGATIONS [Abstract]

Schedule of Debt [Table Text Block]

:

	As of
(in thousands)	September 30, 2018			December 31, 2017
Credit Facility:
Term loan, due 2019	$	—		$	51,094
Revolving credit agreements, due 2019	266,738			3,000
	266,738			54,094
Convertible Debt:
1.50% convertible notes, unsecured, due 2044	377,863			369,259
ATM credit facility	200,000			—
Other obligations	33,696			27,763
Total debt obligations	878,297			451,116
Unamortized debt issuance costs	(3,835		)	(5,816		)
Carrying value of debt	874,462			445,300
Short-term debt obligations and current maturities of long-term debt obligations	(233,074		)	(41,288		)
Long-term debt obligations	$	641,388		$	404,012