ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME - Summary of components of accumulated other comprehensive (loss) income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Accumulated Other Comprehensive Income Loss Defined Benefit Pension and Other Postretirement Plans Net Of Tax [Roll Forward]
Balance	$ (14,688)		$ (12,981)
Change during the quarter:
Before-tax amount
Tax (expense) benefit
Reclassification adjustment, net of taxes:
Amortization of net loss	124	[1]	106	[1]
Total activity for the quarter	124		106
Balance	(14,564)		(12,875)
Accumulated Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax [Roll Forward]
Balance	29		187
Change during the quarter:
Before-tax amount	(96)		(8)
Tax (expense) benefit	35		3
Reclassification adjustment, net of taxes:
Amortization of net loss		[1]		[1]
Total activity for the quarter	(61)		(5)
Balance	(32)		182
Accumulated Other Comprehensive Income Foreign Currency Translation Arising During Period Net Of Tax [Roll Forward]
Balance	413		148
Change during period
Before-tax amount	(244)		159
Tax (expense) benefit			(58)
Reclassification adjustment, net of taxes:
Amortization of net loss		[1]		[1]
Total activity for the quarter	(244)		101
Balance	169		249
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]
Balance	(14,246)		(12,646)
Change during period
Before-tax amount	(340)		151
Tax (expense) benefit	35		(55)
Reclassification adjustment, net of taxes:
Amortization of net loss	124	[1]	106	[1]
Total activity for the quarter	(181)		202
Balance	$ (14,427)		$ (12,444)

[1] Reported as part of selling, general and administrative expenses.