SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Accounts Receivable (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for Doubtful Accounts Receivable [Roll Forward]
Beginning balance	$ 1,088	$ 334	$ 310
Provision	2,468	1,738	28
Write offs	(1,385)	(984)	(4)
Ending balance	$ 2,171	$ 1,088	$ 334
Accounts receivable, general payment terms	30 days
Accounts receivable, domestic extended payment terms	90 days
Accounts receivable, international extended payment terms greater than	90 days