Equity Common Stock (Details) - shares	Dec. 31, 2016	Dec. 31, 2015
Class of Stock [Line Items]
Common Stock, Shares Authorized	170,000,000	170,000,000
Common Stock, Shares, Issued	83,731,769	83,410,961
Common Stock, Capital Shares Reserved for Future Issuance	86,268,231	86,589,039