Consolidated Balance Sheet Parentheticals - $ / shares	Dec. 31, 2017	Dec. 31, 2016
Stockholders' Equity:
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	100,000,000	100,000,000
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	400,000,000	400,000,000
Common Stock, Shares, Issued	45,724,453	45,520,598
Common Stock, Shares, Outstanding	45,724,453	45,520,598