Description of Business and Summary of Significant Accounting Policies Foreign Currency Translation (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Foreign currency exchange gain	$ (536,000)	$ (230,000)	$ 1,759,000	$ 2,635,000
India and Singapore [Member]
Change in Accounting Policy, Effect of Change on Net Income			1,250,000
Foreign currency exchange gain	$ (422,000)