LONG-TERM DEBT (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Feb. 01, 2016	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	May 07, 2014
Debt Instrument [Line Items]
Debt outstanding				$ 299,250
Term loan quarterly payment				$ 8,750
Maturity date				May 07, 2019
Term loan interest rate				2.02%
Undrawn revolving loan				$ 72,000
Maturities of Long-term Debt [Abstract]
Future principle payments		$ 235,112		235,112		$ 260,963
Less current portion of long-term debt		35,000		35,000		$ 35,000
Capitalized costs net of accumulated amortization		1,138		1,138
Amortization expense pertaining to capitalized costs		130	$ 144	398	$ 458
Term Loan [Member]
Debt Instrument [Line Items]
Amount of loan							$ 350,000
Maturities of Long-term Debt [Abstract]
October 1, 2016 to December 31, 2016		8,750		8,750
2017		35,000		35,000
2018		35,000		35,000
2019		192,500		192,500
Future principle payments		271,250		271,250
Less unamortized debt financing costs		1,138		1,138
Less current portion of long-term debt		35,000		35,000
Total long-term debt		235,112		235,112
Revolving Loan [Member]
Debt Instrument [Line Items]
Amount of loan							$ 100,000
Revolving loan used for funding of acquisition and general corporate purposes	$ 65,000
Maturities of Long-term Debt [Abstract]
October 1, 2016 to December 31, 2016		0		0
2017		0		0
2018		0		0
2019		28,000		28,000
Future principle payments		28,000		28,000
Less unamortized debt financing costs		0		0
Less current portion of long-term debt		0		0
Total long-term debt		28,000		28,000
Total Debt [Member]
Maturities of Long-term Debt [Abstract]
October 1, 2016 to December 31, 2016		8,750		8,750
2017		35,000		35,000
2018		35,000		35,000
2019		220,500		220,500
Future principle payments		299,250		299,250
Less unamortized debt financing costs		1,138		1,138
Less current portion of long-term debt		35,000		35,000
Total long-term debt		$ 263,112		$ 263,112