FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Jun. 15, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible Notes Payable, Noncurrent	$ 125,000	$ 125,000
Liabilities:
Accounts Payable, Interest-bearing, Interest Rate		2.00%
Convertible Debt, Noncurrent	94,605	$ 96,700
Debt Instrument, Interest Rate, Effective Percentage		7.66%
Notes Payable, Fair Value Disclosure		$ 87,800
Fair Value, Measurements, Recurring [Member]
Financial Assets:
Deferred compensation assets	4,623		$ 1,859
Financial Liabilities:
Foreign currency contracts	42		518
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Financial Assets:
Deferred compensation assets	1,089		1,245
Financial Liabilities:
Foreign currency contracts	0		0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Assets:
Deferred compensation assets	3,534		614
Financial Liabilities:
Foreign currency contracts	42		518
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Financial Assets:
Deferred compensation assets	0		0
Financial Liabilities:
Foreign currency contracts	0		$ 0
Orad Hi-Tech Systems Ltd. [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Increase (Decrease) in Deferred Compensation	$ 2,900