Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2012

Debt Disclosure [Abstract]

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

Debt as of December 31, 2012 and 2011 consisted of the following (in thousands):

	2012			2011
$400,000,000 senior secured revolving credit facility, due in October 2015	$	217,494		$	247,063
Convertible senior subordinated debentures at 4.125%, due in February 2027	10,009			9,797
Other notes and lease obligations	7,299			8,624
	234,802			265,484
Less current maturities of long-term debt	(5,427		)	(5,044		)
	$	229,375		$	260,440

Schedule of Debt [Table Text Block]

The components of the company’s convertible debt as of December 31, 2012 and 2011 consist of the following (in thousands):

	2012			2011
Carrying amount of equity component	$	25,381		$	25,216
Principal amount of liability component	$	13,350		$	13,850
Unamortized discount	(3,341		)	(4,053		)
Net carrying amount of liability component	$	10,009		$	9,797