Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2012

Long-Term Debt [Abstract]

Financial Debt Covenants

Description	Requirement
Leverage Ratio (Consolidated Indebtedness/Consolidated  Adj. EBITDA)	<  3.50 to 1.00
Fixed Charge Coverage Ratio (Consolidated Free Cash Flow/Consolidated Fixed Charges)	>  1.50 to 1.00
Annual Operating Lease Commitment	< $30.0 million

Debt Amounts Included In Consolidated Balance Sheet

	September 30, 2012		December 31, 2011
Principal amount of convertible debentures	$	186,956	$	186,956
Unamortized debt discount		(14,144)		(20,172)
Carrying amount of convertible debentures	$	172,812	$	166,784
Additional paid in capital (net of tax)	$	31,310	$	31,310

Interest Expense Included In Consolidated Income Statement

	Three months ended September 30,				Nine months ended September 30,
	2012		2011		2012		2011
Cash interest expense	$	1,381	$	1,345	$	4,064	$	3,786
Non-cash amortization of debt discount		2,043		1,910		6,028		5,633
Amortization of debt costs		319		300		940		841
Total interest expense	$	3,743	$	3,555	$	11,032	$	10,260