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Derivative Financial Instruments	9 Months Ended
Sep. 30, 2012
Summary of Derivative Instruments [Abstract]
Derivative Instruments TextBlock	(3) Derivative Financial Instrument We utilize the British pound sterling and the Euro as the functional currency in certain of our foreign operations. As a result, we have exposure to fluctuations in exchange rates between these currencies and the U.S. dollar. From time to time, we may use derivative instruments to protect our investment in these foreign operations by limiting our exposure to fluctuations in exchange rates. During the second quarter of 2012, we entered into a forward contract to sell 45.0 million Euros for U.S. dollars in the third quarter of 2013. This transaction has been designated and qualifies as a hedge of a portion of our net investment in a Euro-functional currency subsidiary. Changes in the fair value of the forward contract, net of the related deferred tax effect, are recognized in our foreign currency translation adjustment, which is a component of accumulated other comprehensive income. This amount will offset changes in the value of the net investment being hedged as the cumulative translation adjustment related to the foreign subsidiary, representing the effect of translating the subsidiary's assets and liabilities from Euros to U.S. dollars, is also reported in our foreign currency translation adjustment. The fair value of the forward contract was a $1.7 million liability at September 30, 2012. This amount is reported in accounts payable and accrued liabilities on our consolidated balance sheet. At inception of the hedge and quarterly thereafter, we assess whether the hedge transaction is effective. Any ineffectiveness would be recognized in earnings immediately as other operating expense. There was no ineffectiveness on the forward contract during 2012.

Derivative Financial Instruments

9 Months Ended

Sep. 30, 2012

Summary of Derivative Instruments [Abstract]

(3) Derivative Financial Instrument

We utilize the British pound sterling and the Euro as the functional currency in certain of our foreign operations. As a result, we have exposure to fluctuations in exchange rates between these currencies and the U.S. dollar. From time to time, we may use derivative instruments to protect our investment in these foreign operations by limiting our exposure to fluctuations in exchange rates.

During the second quarter of 2012, we entered into a forward contract to sell 45.0 million Euros for U.S. dollars in the third quarter of 2013. This transaction has been designated and qualifies as a hedge of a portion of our net investment in a Euro-functional currency subsidiary. Changes in the fair value of the forward contract, net of the related deferred tax effect, are recognized in our foreign currency translation adjustment, which is a component of accumulated other comprehensive income. This amount will offset changes in the value of the net investment being hedged as the cumulative translation adjustment related to the foreign subsidiary, representing the effect of translating the subsidiary's assets and liabilities from Euros to U.S. dollars, is also reported in our foreign currency translation adjustment.

The fair value of the forward contract was a $1.7 million liability at September 30, 2012. This amount is reported in accounts payable and accrued liabilities on our consolidated balance sheet. At inception of the hedge and quarterly thereafter, we assess whether the hedge transaction is effective. Any ineffectiveness would be recognized in earnings immediately as other operating expense. There was no ineffectiveness on the forward contract during 2012.