LONG TERM DEBT (Details) - USD ($) $ in Thousands		12 Months Ended
	Feb. 01, 2016	Dec. 31, 2016	Dec. 31, 2015	May 07, 2014
Debt Instrument [Line Items]
Debt outstanding		$ 281,500
Term loan quarterly payment		$ 8,750
Maturity date		May 07, 2019
Term loan interest rate		2.27%
Undrawn revolving loan		$ 81,000
Maturities of Long-term Debt [Abstract]
Less current portion of long-term debt		35,000	$ 35,000
Total long-term debt		226,490	260,963
Capitalized costs net of accumulated amortization		1,010
Amortization expense pertaining to capitalized costs		526	$ 603
Term Loan [Member]
Debt Instrument [Line Items]
Amount of loan				$ 350,000
Maturities of Long-term Debt [Abstract]
2017		35,000
2018		35,000
2019		192,500
Future principle payments		262,500
Less unamortized debt financing costs		1,010
Less current portion of long-term debt		35,000
Total long-term debt		226,490
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]
2017		0
2018		0
2019		19,000
Future principle payments		19,000
Less unamortized debt financing costs		0
Less current portion of long-term debt		0
Total long-term debt		19,000
Total Debt [Member]
Maturities of Long-term Debt [Abstract]
2017		35,000
2018		35,000
2019		211,500
Future principle payments		281,500
Less unamortized debt financing costs		1,010
Less current portion of long-term debt		35,000
Total long-term debt		$ 245,490