Equity (Equity Incentive Plans) (Details) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jun. 28, 2011	Jul. 09, 2007	Aug. 15, 2005
Equity Incentive Plans [Line Items]
Shares are cancelled or forfeited after the effective date	150,590	262,347	360,139
Shares available for future issuance under plan	1,500,000	900,000	900,000
Maximum [Member]
Equity Incentive Plans [Line Items]
Vesting Period	4 years
Minimum [Member]
Equity Incentive Plans [Line Items]
Vesting Period	3 years
Equity Incentive Plan 2005 [Member]
Equity Incentive Plans [Line Items]
Awards authorized and reserved under plan						14,000,000
Stock options outstanding under plan	500,000	600,000
Shares available for future issuance under plan	0
Equity Incentive Plan 2007 [Member]
Equity Incentive Plans [Line Items]
Awards authorized and reserved under plan	1,192,777			15,300,000	9,000,000
Shares are cancelled or forfeited after the effective date	4,916,835
Stock options, RSAs, and RSUs outstanding under plan	3,500,000	3,100,000
Shares available for future issuance under plan	0
Equity Incentive Plan 2015 [Member]
Equity Incentive Plans [Line Items]
Awards authorized and reserved under plan	7,000,000