LONG-TERM DEBT (Details) - USD ($) $ in Thousands		3 Months Ended
	Oct. 31, 2016	Mar. 31, 2017	Dec. 31, 2016
Borrowings [Abstract]
Long-term debt		$ 227,219	$ 224,685
Less unamortized debt issuance costs		(822)	(992)
Less: Current portion		(224,715)	(51,354)
Long-term debt less current maturities		2,504	173,331
Line of Credit [Member]
Borrowings [Abstract]
Long-term debt		153,800	147,600
Term Loan [Member]
Borrowings [Abstract]
Long-term debt		70,875	74,500
Promissory Note Payable [Member]
Borrowings [Abstract]
Long-term debt		$ 3,366	$ 3,577
Interest rate		2.90%	2.90%
Wells Fargo Bank, National Association [Member] | Term Loan [Member]
Borrowings [Abstract]
Maximum borrowing capacity		$ 70,900
Wells Fargo Bank, National Association [Member] | Revolving Credit Facility [Member]
Borrowings [Abstract]
Maximum borrowing capacity		$ 190,000
Expiration date		Mar. 31, 2018
Debt amortization expenses payable per quarter in current year and thereafter		$ 15,625
Payments on long term debt due next fiscal year	$ 12,000
Amount outstanding		$ 224,700
Weighted average interest rate		6.00%
Available for borrowing under the facility		$ 29,900
Commitment fee		0.50%
Wells Fargo Bank, National Association [Member] | Revolving Credit Facility [Member] | LIBOR [Member]
Borrowings [Abstract]
Basis spread on base rate		5.00%
Wells Fargo Bank, National Association [Member] | Revolving Credit Facility [Member] | Prime Rate [Member]
Borrowings [Abstract]
Basis spread on base rate		4.00%