PENSIONS AND OTHER BENEFITS - Components of amounts recognized in accumulated other comprehensive income, before tax effect (Details) (Components of amounts recognized in accumulated other comprehensive income, before tax effect, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Components of amounts recognized in accumulated other comprehensive income, before tax effect
Net gain (loss)	$ 924	$ (711)	$ (3,118)