FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Fair value disclosure
Carrying value of debt obligations	$ 124,246	$ 155,985
Carrying value
Fair value disclosure
Carrying value of debt obligations	112,968	132,756
Fair value disclosure
Fair value disclosure
Fair value of debt obligations	112,978	132,904
Term Loan
Fair value disclosure
Carrying value of debt obligations	86,875	95,000
Term Loan | Carrying value
Fair value disclosure
Carrying value of debt obligations	86,875	95,000
Term Loan | Fair value disclosure
Fair value disclosure
Fair value of debt obligations	86,875	95,000
Notes payable
Fair value disclosure
Carrying value of debt obligations	26,093	37,756
Notes payable | Carrying value
Fair value disclosure
Carrying value of debt obligations	26,093	37,756
Notes payable | Fair value disclosure
Fair value disclosure
Fair value of debt obligations	$ 26,103	$ 37,904