EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS - Recognized in Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Compensation and Retirement Disclosure [Abstract]
Net actuarial loss	$ 820	$ 675
Amortization of prior service cost	(105)	(105)
Deferred tax liabilities	(270)	(215)
Net amount recognized in accumulated other comprehensive income (loss)	$ (445)	$ (355)