Stockholders' Equity Shareholder Rates and Preferred Stock (Details)	12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares	Dec. 31, 2017 $ / shares $ / unit
Shareholder Rates and Preferred Stock [Abstract]
Stock Issued During Period, Value, Other | $	$ 62.26
Preferred Stock, Par or Stated Value Per Share | $ / shares	$ 0.01	$ 0.01
Preferred Stock, Price Per Unit | $ / unit		70