LONG-TERM DEBT (Details) - USD ($) $ in Thousands		3 Months Ended
	Feb. 01, 2016	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	May 07, 2014
Debt Instrument [Line Items]
Debt outstanding		$ 269,750
Term loan quarterly payment		$ 8,750
Maturity date		May 07, 2019
Term loan interest rate		2.48%
Undrawn revolving loan		$ 84,000
Maturities of Long-term Debt [Abstract]
Less current portion of long-term debt		35,000		$ 35,000
Total long-term debt		217,864		$ 226,490
Capitalized costs net of accumulated amortization		886
Amortization expense pertaining to capitalized costs		124	$ 137
Term Loan [Member]
Debt Instrument [Line Items]
Amount of loan					$ 350,000
Maturities of Long-term Debt [Abstract]
April 1, 2017 to December 31, 2017		26,250
2018		35,000
2019		192,500
Future principal payments		253,750
Less unamortized debt financing costs		886
Less current portion of long-term debt		35,000
Total long-term debt		217,864
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]
April 1, 2017 to December 31, 2017		0
2018		0
2019		16,000
Future principal payments		16,000
Less unamortized debt financing costs		0
Less current portion of long-term debt		0
Total long-term debt		16,000
Total Debt [Member]
Maturities of Long-term Debt [Abstract]
April 1, 2017 to December 31, 2017		26,250
2018		35,000
2019		208,500
Future principal payments		269,750
Less unamortized debt financing costs		886
Less current portion of long-term debt		35,000
Total long-term debt		$ 233,864