Pension And Postretirement Benefit Plans (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2016 USD ($) employee
Defined Benefit Plan Disclosure [Line Items]
Retired employees receiving health care and life insurance benefits | employee		9
Post retirement benefits, age eligibility requirement		65 years
Post retirement benefits, service eligibility requirement		15 years
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost | $	$ 0	$ (1)