SEGMENT AND GEOGRAPHIC INFORMATION, Reconciliation of Segment Revenue and Income (Loss) from Operations to Consolidated Financial Statements (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (loss) from operations segment reconciliation	$ (39,091)	$ (16,641)
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	295,623	267,474	310,746
Total revenue from reportable operating segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	272,116	242,307
Unallocated revenue to segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	23,507	25,167
Total income (loss) from operations from reportable operating segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (loss) from operations segment reconciliation	26,438	55,659
Unallocated income (loss) from operations to segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (loss) from operations segment reconciliation	$ (65,529)	$ (72,300)