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, 2014		Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31, 2013	$ (10,115)		$ (14,246)
Change during the period:
Before-tax amount	(527)		(340)
Tax benefit (expense)	20		35
Reclassification adjustment, net of taxes:
Amortization of net loss	84	[1]	124	[1]
Total activity for the period	(423)		(181)
Balance at March 31, 2014	(10,538)		(14,427)
Pension Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31, 2013	(9,760)		(14,688)
Change during the period:
Before-tax amount
Tax benefit (expense)
Reclassification adjustment, net of taxes:
Amortization of net loss	84	[1]	124	[1]
Total activity for the period	84		124
Balance at March 31, 2014	(9,676)		(14,564)
Unrealized Gain (Loss) On Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31, 2013	10		29
Change during the period:
Before-tax amount	(56)		(96)
Tax benefit (expense)	20		35
Reclassification adjustment, net of taxes:
Amortization of net loss		[1]		[1]
Total activity for the period	(36)		(61)
Balance at March 31, 2014	(26)		(32)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at December 31, 2013	(365)		413
Change during the period:
Before-tax amount	(471)		(244)
Tax benefit (expense)
Reclassification adjustment, net of taxes:
Amortization of net loss		[1]		[1]
Total activity for the period	(471)		(244)
Balance at March 31, 2014	$ (836)		$ 169

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