INCOME TAXES - Provision for Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current:
Federal	$ 202	$ 11,902	$ 300
State	321	1,428	634
Foreign	1,798	1,584	641
Current income tax expense	2,321	14,914	1,575
Deferred:
Federal	1,095	245	5,874
State	122	27	68
Foreign	(7)	(66)	66
Deferred income tax expense	1,210	206	6,008
Income tax expense	$ 3,531	$ 15,120	$ 7,583