Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Long-term debt	$ 24,688	$ 45,286
Less current maturities of long-term debt	(781)	(14,102)
Long-term debt net of current maturities	23,907	31,184
Convertible Subordinated Debt | Convertible Senior Subordinated Debentures at 4.125% February 2027
Debt Instrument [Line Items]
Long-term debt	11,166	10,641
Notes Payable, Other Payables [Member]
Debt Instrument [Line Items]
Long-term debt	5,522	6,536
Senior secured revolving credit facility, due in October 2015 [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Long-term debt	$ 8,000	$ 28,109