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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Accounts Receivable (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Allowance for Doubtful Accounts Receivable [Roll Forward]
Beginning balance	$ 2,549	$ 1,079	$ 2,171	$ 1,088
Provision	608	496	2,197	970
Write offs	(795)	(339)	(2,006)	(822)
Ending balance	$ 2,362	$ 1,236	$ 2,362	$ 1,236
Accounts receivable, general payment terms	30 days		30 days
Accounts receivable, international extended payment terms greater than	90 days		90 days

Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

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