EMPLOYEE BENEFIT PLANS - Recognized in Accumulated Other Comprehensive Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Schedule of Pension and Other Postretirment Benefits Recgonized in Accumulated Other Comprehensive Income (Loss) [Line Items]
Net actuarial loss	$ 675	$ 525	$ 1,350	$ 1,050
Amortization of prior service cost	(105)	(100)	(210)	(200)
Deferred tax liabilities	(215)	(160)	(430)	(321)
Change in retirement obligation	$ 355	$ 265	$ 710	$ 529