Post-retirement Plan (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	8 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Feb. 01, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation			$ 52,851
Defined Benefit Plan Assets			54,156
Defined Benefit Plan, Funded (Unfunded) Status of Plan			1,305
Defined Benefit Plan, Other Cost (Credit)	$ 200	$ 400
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation			$ 8,600