Long-Term Debt And Credit Facilities (Revolving Line Of Credit) (Narrative) (Details) - Jun. 30, 2015 - Revolving Credit Facility [Member] $ in Millions	USD ($)
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 10.0
Line of credit maturity date	Mar. 31, 2018
Minimum tangible net worth requirement, period one	$ (21.5)
Minimum tangible net worth requirement, period two	(22.5)
Minimum tangible net worth requirement, period three	(23.5)
Minimum tangible net worth requirement, period four	(24.5)
Line of credit facility, amount outstanding	0.0
Line of credit facility, current borrowing capacity	$ 6.0
Minimum [Member]
Line of Credit Facility [Line Items]
Liquidity ratio	1.50