Equity Award Plans and Stock-Based Compensation (Details) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2012 2010 Incentive Plan [Member]	Jun. 30, 2012 Stock Options [Member] 2010 Incentive Plan [Member]	Jun. 30, 2012 Maximum [Member] 2010 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contratual term of outstanding options		10 years
Share based compensation by share based payment award portion of options vesting in one year		25.00%
Share based compensation by share based payment award portion of options vesting in equal installments over forty eight monts		75.00%
allocated share based compensation expense, modification of stock options	$ 0.5
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized				1,965,000
Share-based Compensation Arrangement by Share-based Payment Award, Percent of Additional Shares Authorized				4.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			5 years