Income Taxes From Continuing Operations (Schedule of Tax Credit Carry Forward) (Details) - State and Local Jurisdiction $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)
Tax Credit Carryforward [Line Items]
U.S. State Tax Credits	$ 3,482
Illinois
Tax Credit Carryforward [Line Items]
U.S. State Tax Credits	$ 2,894
Illinois | Minimum
Tax Credit Carryforward [Line Items]
U.S. State tax credits, expiration periods	Dec. 31, 2017
Illinois | Maximum
Tax Credit Carryforward [Line Items]
U.S. State tax credits, expiration periods	Dec. 31, 2021
California
Tax Credit Carryforward [Line Items]
U.S. State Tax Credits	$ 588