Debt Obligations(Tables)

12 Months Ended

Dec. 31, 2012

Debt Disclosure [Abstract]

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

Long-term debt obligations consist of the following as of December 31, 2012 and 2011:

	As of December 31,
(in thousands)	2012			2011
3.50% convertible debentures, unsecured, due 2025	$	3,586		$	165,173
Term loan, due 2016	74,500			79,000
Revolving credit agreements	215,117			87,194
	293,203			331,367
Less current maturities of long-term debt obligations	(6,500		)	(169,673		)
Long-term debt obligations	$	286,703		$	161,694