Pension And Other Retirement Plans Net Periodic Benefit Cost For Pension Benefit Plan (Details) - Pension Plan - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 177	$ 198	$ 346	$ 354
Interest cost	20,611	20,531	41,362	40,908
Expected return on plans’ assets	(26,895)	(28,009)	(53,808)	(55,845)
Amortization of prior service costs	45	0	45	0
Net periodic benefit credit	$ (6,062)	$ (7,280)	$ (12,055)	$ (14,583)