FAIR VALUE MEASUREMENTS (Summary of Fair Value of Financial Assets Measured at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets: [Abstract]
Cash and cash equivalents	$ 186
Trade accounts receivable, net	36,855
Fair value of interest rate swap		$ 475
Liabilities: [Abstract]
Accounts payable	5,909
Accrued expenses including estimated fair value of contingent earn-out consideration	12,245
Long term liabilities including estimated fair value of contingent earn-out consideration	934	$ 4,123
Long-term debt	272,183
Fair value of interest rate swap	2,011
Quoted prices in active markets (Level 1) [Member]
Assets: [Abstract]
Cash and cash equivalents	186
Trade accounts receivable, net	36,855
Liabilities: [Abstract]
Accounts payable	5,909
Accrued expenses including estimated fair value of contingent earn-out consideration	11,472
Long term liabilities including estimated fair value of contingent earn-out consideration	21
Long-term debt	$ 272,183
Fair value of interest rate swap
Significant Other Observable Inputs (Level 2) [Member]
Assets: [Abstract]
Cash and cash equivalents
Trade accounts receivable, net
Liabilities: [Abstract]
Accounts payable
Accrued expenses including estimated fair value of contingent earn-out consideration
Accrued interest
Long term liabilities including estimated fair value of contingent earn-out consideration
Long-term debt
Fair value of interest rate swap	$ 2,011
Significant Unobservable Inputs (Level 3) [Member]
Assets: [Abstract]
Cash and cash equivalents
Trade accounts receivable, net
Liabilities: [Abstract]
Accounts payable
Accrued expenses including estimated fair value of contingent earn-out consideration	$ 773
Accrued interest
Long term liabilities including estimated fair value of contingent earn-out consideration	$ 913
Long-term debt
Fair value of interest rate swap