Employee Benefits (Retirement Plans And Other Postretirement Benefits) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Retirement Income Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2,189	$ 2,430	$ 4,362	$ 4,830	$ 8,859	$ 9,245
Interest cost	3,790	3,400	7,660	6,800	14,474	13,579
Expected return on plan assets	(4,656)	(4,275)	(9,336)	(8,550)	(17,894)	(15,772)
Amortization of prior service (benefit) cost	(894)	25	(1,153)	50	(1,106)	107
Amortization of net (gain) loss	2,515	2,745	4,288	5,420	9,966	11,098
Net periodic benefit cost (benefit)	2,944	4,325	5,821	8,550	14,299	18,257
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	722	1,100	1,422	2,200	3,065	4,389
Interest cost	1,107	1,375	2,232	2,750	4,638	5,576
Expected return on plan assets	(533)	(475)	(1,058)	(950)	(2,059)	(1,776)
Amortization of prior service (benefit) cost	(1,176)	(1,425)	(2,376)	(2,850)	(5,183)	(5,789)
Amortization of net (gain) loss	(686)	0	(1,336)	0	(1,962)	308
Net periodic benefit cost (benefit)	$ (566)	$ 575	$ (1,116)	$ 1,150	$ (1,501)	$ 2,708