Pension and Non-pension Postretirement Benefits (Net Benefit Costs) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jan. 02, 2013
Amortization of unrecognized:
Settlement charge	$ 715,000	$ 0	$ 715,000	$ 0
Defined Benefit Pension Plans and SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1,778,000	1,918,000	3,778,000	3,915,000
Interest cost	4,696,000	5,005,000	9,433,000	10,280,000
Expected return on plan assets	(6,101,000)	(5,044,000)	(12,181,000)	(10,136,000)
Amortization of unrecognized:
Prior service cost	353,000	584,000	708,000	1,171,000
Loss / (gain)	2,478,000	1,843,000	4,803,000	3,779,000
Settlement charge	715,000	37,000	715,000	457,000
Pension expense or non-pension postretirement benefit expense	3,919,000	4,343,000	7,256,000	9,466,000
Defined Benefit Plan, Contributions [Abstract]
Employer contributions made to defined benefit plans	2,100,000		2,800,000
Estimated employer contributions to defined benefit plans in remainder of 2013	3,600,000		3,600,000
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1,092,000	1,370,000	2,370,000	2,925,000
Interest cost	3,501,000	3,827,000	6,982,000	7,846,000
Expected return on plan assets	(5,605,000)	(4,461,000)	(11,204,000)	(8,946,000)
Amortization of unrecognized:
Prior service cost	293,000	522,000	586,000	1,043,000
Loss / (gain)	2,263,000	1,719,000	4,350,000	3,520,000
Settlement charge	715,000	37,000	715,000	457,000
Pension expense or non-pension postretirement benefit expense	2,259,000	3,014,000	3,799,000	6,845,000
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	686,000	548,000	1,408,000	990,000
Interest cost	1,195,000	1,178,000	2,451,000	2,434,000
Expected return on plan assets	(496,000)	(583,000)	(977,000)	(1,190,000)
Amortization of unrecognized:
Prior service cost	60,000	62,000	122,000	128,000
Loss / (gain)	215,000	124,000	453,000	259,000
Settlement charge	0	0	0	0
Pension expense or non-pension postretirement benefit expense	1,660,000	1,329,000	3,457,000	2,621,000
Non-Pension Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	204,000	368,000	596,000	736,000
Interest cost	641,000	882,000	1,365,000	1,765,000
Amortization of unrecognized:
Prior service cost	36,000	106,000	70,000	211,000
Loss / (gain)	139,000	228,000	429,000	457,000
Pension expense or non-pension postretirement benefit expense	1,020,000	1,584,000	2,460,000	3,169,000
Defined Benefit Plan, Contributions [Abstract]
Employer contributions made to defined benefit plans	1,200,000		2,200,000
Estimated employer contributions to defined benefit plans in year 2013	4,700,000		4,700,000
Retirees subject to health reimbursement arrangement, minimum age					65 years
Life insurance benefit, maximum					10,000
U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	203,000	367,000	595,000	735,000
Interest cost	610,000	856,000	1,311,000	1,713,000
Amortization of unrecognized:
Prior service cost	36,000	106,000	70,000	211,000
Loss / (gain)	138,000	229,000	429,000	458,000
Pension expense or non-pension postretirement benefit expense	987,000	1,558,000	2,405,000	3,117,000
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1,000	1,000	1,000	1,000
Interest cost	31,000	26,000	54,000	52,000
Amortization of unrecognized:
Prior service cost	0	0	0	0
Loss / (gain)	1,000	(1,000)	0	(1,000)
Pension expense or non-pension postretirement benefit expense	$ 33,000	$ 26,000	$ 55,000	$ 52,000