Stock-Based Compensation And Incentive Performance Plans (Long-Term Incentive Plan) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other labor-related expenses	$ 21	$ 1,128	$ 525	$ 2,255
Long Term Incentive Plan 2015-2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award requisite service period			2 years
Long Term Incentive Plan 2016-2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award requisite service period			3 years
Conversion of common stock (in shares)					1