DEBT - Schedule of Debt and Capital Leases (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Long-term debt	$ 84,059	$ 63,459
Less: current maturities	2,337	1,861
Total long-term debt	81,722	61,598
Senior secured credit facility due 2015
Debt Instrument [Line Items]
Long-term debt	18,000	13,300
Senior secured notes due 2015
Debt Instrument [Line Items]
Long-term debt	61,113	0
Convertible notes due 2015
Debt Instrument [Line Items]
Long-term debt	103	46,142
Other financing
Debt Instrument [Line Items]
Long-term debt	$ 4,843	$ 4,017