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Significant Accounting Policies (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Schedule of allowance for doubtful accounts
Allowance for doubtful accounts, beginning of period	$ 8,733	$ 9,144	$ 8,835	$ 10,303
Additions charged to expense	2,293	3,652	9,315	12,255
Write-offs, net of recoveries	(1,250)	(4,228)	(8,374)	(13,990)
Allowance for doubtful accounts, end of period	$ 9,776	$ 8,568	$ 9,776	$ 8,568

X

- Definition

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.5-02.4)



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X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount of direct write-downs of accounts receivable charged against the allowance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



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-Name Accounting Standards Codification



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- Definition

Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



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