ACCUMULATED OTHER COMPREHENSIVE LOSS - Summary of Changes in Accumulated Other Comprehensive Loss Included Within Shareholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Loss [Line Items]
Balance, beginning of period	$ 535,637
Other comprehensive income (loss) before tax	1,959	$ 5,673
Other comprehensive income (loss), tax	(448)	(1,151)
Other comprehensive income (loss)	1,511	4,522
Balance, end of period	530,622
Foreign currency translation adjustments
Accumulated Other Comprehensive Loss [Line Items]
Balance, beginning of period	(31,973)	(28,124)
Other comprehensive income (loss) before tax	2,108	6,226
Other comprehensive income (loss), tax	(508)	(1,363)
Balance, end of period	(29,865)	(21,898)
Foreign currency hedge
Accumulated Other Comprehensive Loss [Line Items]
Balance, beginning of period	5,048	4,567
Other comprehensive income (loss) before tax	(166)	(553)
Other comprehensive income (loss), tax	63	212
Balance, end of period	4,882	4,014
Defined benefit pension plans
Accumulated Other Comprehensive Loss [Line Items]
Balance, beginning of period	(10,518)
Other comprehensive income (loss) before tax	17	0
Other comprehensive income (loss), tax	(3)	0
Balance, end of period	(10,501)
Tax provision
Accumulated Other Comprehensive Loss [Line Items]
Balance, beginning of period	8,443	5,183
Other comprehensive income (loss), tax	(448)	(1,151)
Balance, end of period	7,995	4,032
Accumulated other comprehensive loss
Accumulated Other Comprehensive Loss [Line Items]
Balance, beginning of period	(29,000)	(18,374)
Other comprehensive income (loss)	1,511	4,522
Balance, end of period	$ (27,489)	$ (13,852)