Real Estate Inventory (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2017	Dec. 31, 2016
Real Estate [Abstract]
Real estate inventory, selling price			$ 4.1
Lease agreement term		5 years
Annual rental payments		$ 0.7
Rental income			$ 0.3
Sale of real estate inventory	$ 4.1
Real Estate, Inventory Post Write-down Carrying Value	3.7
Closing costs on sale of real estate inventory	0.3
Gross profit realized on sale of real estate inventory	$ 0.1