ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Accumulated other comprehensive income activity
Balance at the beginning of the period	$ 109,751	$ 60,683
Other comprehensive loss before reclassifications	(4,252)	(29,067)
Amounts reclassified from accumulated other comprehensive income	1,107	2,224
Net current-period other comprehensive (loss)/income	(3,145)	(26,843)
Balance at the end of the period	106,606	33,840
Foreign Currency
Accumulated other comprehensive income activity
Balance at the beginning of the period	149,965	120,097
Other comprehensive loss before reclassifications	(4,252)	(29,067)
Amounts reclassified from accumulated other comprehensive income	(340)
Net current-period other comprehensive (loss)/income	(4,592)	(29,067)
Balance at the end of the period	145,373	91,030
Defined Benefit Pension Plans
Accumulated other comprehensive income activity
Balance at the beginning of the period	(40,093)	(59,248)
Amounts reclassified from accumulated other comprehensive income	1,435	2,194
Net current-period other comprehensive (loss)/income	1,435	2,194
Balance at the end of the period	(38,658)	(57,054)
Other
Accumulated other comprehensive income activity
Balance at the beginning of the period	(121)	(166)
Amounts reclassified from accumulated other comprehensive income	12	30
Net current-period other comprehensive (loss)/income	12	30
Balance at the end of the period	$ (109)	$ (136)