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Fair value of the gross assets less the gross liabilities of a derivative asset or group of derivative assets.

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Fair value of the assets less the liabilities of a derivative or group of derivatives.

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The amount of gain recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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Fair value of the gross liabilities less the gross assets of a derivative liability or group of derivative liabilities.

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Date the derivative contract matures, in CCYY-MM-DD format.

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The estimated net amount of unrealized gains or losses on foreign currency cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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Aggregate notional amount of all foreign currency derivatives designated as hedging instruments in cash flow hedges. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

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Amount after tax and reclassification adjustments, resulting from the process of expressing in the reporting currency of the reporting entity those amounts that are denominated or measured in a different currency, and from transactions whose terms are denominated in a currency other than the entity's functional currency, which is attributable to the parent entity.

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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Derivative Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended					3 Months Ended			3 Months Ended			3 Months Ended			3 Months Ended			3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 Designated as Hedging Instrument [Member]	Dec. 31, 2012 Designated as Hedging Instrument [Member]	Mar. 31, 2013 Euro [Member]	Mar. 31, 2013 Euro [Member] Minimum [Member]	Mar. 31, 2013 Euro [Member] Maximum [Member]	Mar. 31, 2013 Australian Dollar [Member]	Mar. 31, 2013 Australian Dollar [Member] Minimum [Member]	Mar. 31, 2013 Australian Dollar [Member] Maximum [Member]	Mar. 31, 2013 British Pound [Member]	Mar. 31, 2013 British Pound [Member] Minimum [Member]	Mar. 31, 2013 British Pound [Member] Maximum [Member]	Mar. 31, 2013 Canadian Dollar [Member]	Mar. 31, 2013 Canadian Dollar [Member] Minimum [Member]	Mar. 31, 2013 Canadian Dollar [Member] Maximum [Member]	Mar. 31, 2013 New Zealand Dollar [Member]	Mar. 31, 2013 New Zealand Dollar [Member] Minimum [Member]	Mar. 31, 2013 New Zealand Dollar [Member] Maximum [Member]
Derivative [Line Items]
Notional amount of foreign currency forward contracts					$ 10,400			$ 6,100			$ 2,570			$ 1,610			$ 405
Derivative maturity date range						Apr. 30, 2013	Mar. 31, 2014		Apr. 30, 2013	Jul. 31, 2014		Apr. 30, 2013	Jun. 30, 2014		Apr. 30, 2013	Jun. 30, 2014		May 31, 2013	Jul. 31, 2013
Derivatives, Fair Value [Line Items]
Forward contracts, assets			401	952
Forward contracts, liabilities			346	115
Total net forward contracts			55	837
Unrealized Gains and Losses Included in AOCI [Abstract]
Beginning Balance	544	(1,153)
Other comprehensive income (loss), net of income taxes	(509)	933
Ending Balance	35	(220)
Amount of gain loss recognized in income statement			0
Forward contracts expected to be reclassified in net revenue during next 12 months	$ 32