Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2011

Debt Disclosure [Abstract]

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

Debt as of December 31, 2011 and 2010 consisted of the following (in thousands):

	2011			2010
$400,000,000 senior secured revolving credit facility, due in October 2015	$	247,063		$	184,932
Convertible senior subordinated debentures at 4.125%, due in February 2027	9,797			52,064
Other notes and lease obligations	8,624			9,068
	265,484			246,064
Less current maturities of long-term debt	(5,044		)	(7,974		)
	$	260,440		$	238,090

Schedule of Debt [Table Text Block]

The components of the company’s convertible debt as of December 31, 2011 and 2010 consist of the following (in thousands):

	2011			2010
Carrying amount of equity component	$	25,216		$	46,205
Principal amount of liability component	$	13,850		$	77,201
Unamortized discount	(4,053		)	(25,137		)
Net carrying amount of liability component	$	9,797		$	52,064