Pension and Other Post-Retirement Benefits (Reconciliation of the Funded Status) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension Benefits
Change in benefit obligation:
Benefit obligation at January 1	$ 494,272	$ 543,799
Service cost	0	0	0
Interest cost	20,518	18,447	21,505
Actuarial loss (gain)	51,274	(34,269)
Participant contributions	0	0
Plan change	0	0
Benefits paid	(34,276)	(34,429)
Transfer from Canfield Salaried SEPP	36	724
Benefit obligation at December 31	531,824	494,272	543,799
Change in plan assets:
Fair value of plan assets at January 1	351,869	328,726
Actual returns on plan assets	(14,676)	43,742
Participant contributions	0	0
Benefits paid	(34,276)	(34,429)
Company contributions	20,540	13,106
Transfer from Canfield Salaried SEPP	36	724
Fair value of plan assets at December 31	323,493	351,869	328,726
Funded status	(208,331)	(142,403)
ABO at January 1	494,272	543,799
ABO at December 31	531,824	494,272	543,799
Amounts recognized on the consolidated balance sheet:
Current liability	0	0
Noncurrent liability	(208,331)	(142,403)
Total	(208,331)	(142,403)
Other Post-Retirement Benefits
Change in benefit obligation:
Benefit obligation at January 1	1,084	4,208
Service cost	0	0	0
Interest cost	49	98	163
Actuarial loss (gain)	293	(1,403)
Participant contributions	1	4
Plan change	0	(1,506)
Benefits paid	(71)	(317)
Transfer from Canfield Salaried SEPP	0	0
Benefit obligation at December 31	1,356	1,084	4,208
Change in plan assets:
Fair value of plan assets at January 1	0	0
Actual returns on plan assets	0	0
Participant contributions	1	4
Benefits paid	(71)	(317)
Company contributions	70	313
Transfer from Canfield Salaried SEPP	0	0
Fair value of plan assets at December 31	0	0	0
Funded status	(1,356)	(1,084)
ABO at January 1	1,084	4,208
ABO at December 31	1,356	1,084	4,208
Amounts recognized on the consolidated balance sheet:
Current liability	(124)	(111)
Noncurrent liability	(1,232)	(973)
Total	$ (1,356)	$ (1,084)