Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Long-term Debt	$ 56,069	$ 234,802
Long-term Debt, Current Maturities	(1,294)	(5,427)
Long-term Debt, Excluding Current Maturities	54,775	229,375
Line of Credit [Member] | Senior Secured Revolving Credit Facility October 2015 [Member]
Debt Instrument [Line Items]
Long-term Debt	38,968	217,494
Convertible Subordinated Debt [Member] | Convertible Senior Subordinated Debentures February 2027 [Member]
Debt Instrument [Line Items]
Long-term Debt	10,476	10,009
Notes Payable, Other Payables [Member] | Other Notes and Lease Obligations [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 6,625	$ 7,299