Separation Agreements (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2010
Share-based Arrangements with Employees and Nonemployees [Abstract]
Accelerated Vesting of Stock Options Due to Separation Agreements	0.1
Accelerated Vesting of RSUs Due to Separation Agreements	0.1
Accelerated share-based compensation related to separation agreement	$ 0.2
Forfeiture of Stock Options Due to Separation Agreements	0.2
Forfeiture of RSUs Due to Separation Agreements	0.2