Schedule II Financial Information of Registrant Parent Company Parenthetical - $ / shares	Dec. 31, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Common Stock, Par or Stated Value Per Share	$ 0.001	$ 0.001
Common Stock, Shares Authorized	485,000,000	485,000,000
Common Stock, Shares, Issued	232,091,921	224,432,465
Common Stock, Shares, Outstanding	214,521,079	206,871,768
Treasury Stock, Shares	17,570,842	17,560,697
Parent Company
Condensed Financial Statements, Captions [Line Items]
Common Stock, Par or Stated Value Per Share	$ 0.001	$ 0.001
Common Stock, Shares Authorized	485,000,000	485,000,000
Common Stock, Shares, Issued	232,091,921	208,601,020
Common Stock, Shares, Outstanding	214,521,079	191,053,530
Treasury Stock, Shares	17,570,842	17,547,490