Financing Arrangement (Details) - Tax Increment Financing Obligation Bond [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Financing Obligation [Line Items]
Term of period for financing obligation payments	20 years
Expiration date for financing obligation	Oct. 31, 2019
Discount rate of financing obligation		6.93%
Financing obligation		$ 7.4