Stockholders' Equity (Stock Option Plans) (Narrative) (Details)	12 Months Ended
	Dec. 31, 2011 years months
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for issuance under the 2011 equity incentive plan, post stock split	19,800,000
Effective date of stock split	Jul. 01, 2011
Expired, cancelled, or forfeited shares of past plans added to reserve of 2011 plan, post split, maximum	13,636,548
Shares assumed from acquisition, post split	2,708,198
Vesting percentage after completing one year of service	25.00%
Previously terminated plans, remaining vesting period, months	36
Previously terminated plans, vesting period maximum, years	4
Amended 2004 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for issuance	7,200,000