Nonpension Postretirement Benefits (Change in Accumulated Benefit Obligation) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Nonpension Postretirement Benefit Plans
Change in projected benefit obligation:
Benefit obligation, beginning of year	$ 76,207	$ 73,217
Service Cost	1,192	1,472	1,361
Interest cost	2,732	3,530	3,754
Plan participants' contributions	810	1,307
ERRP to be used to reduce retiree contribution	0	76
Plan amendments	0	(2,672)
Actuarial (gain) loss	(11,239)	3,654
Exchange rate fluctuations	(188)	61
Benefits paid	(5,691)	(4,438)
Benefit obligation, end of year	63,823	76,207	73,217
Funded status and accrued benefit cost	(63,823)	(76,207)
U.S. Plans
Change in projected benefit obligation:
Benefit obligation, beginning of year	73,523	70,541
Service Cost	1,190	1,470	1,359
Interest cost	2,622	3,426	3,632
Plan participants' contributions	810	1,307
ERRP to be used to reduce retiree contribution	0	76
Plan amendments	0	(2,672)
Actuarial (gain) loss	(11,477)	3,682
Exchange rate fluctuations	0	0
Benefits paid	(5,551)	(4,307)
Benefit obligation, end of year	61,117	73,523	70,541
Funded status and accrued benefit cost	(61,117)	(73,523)
Non-U.S. Plans
Change in projected benefit obligation:
Benefit obligation, beginning of year	2,684	2,676
Service Cost	2	2	2
Interest cost	110	104	122
Plan participants' contributions	0	0
ERRP to be used to reduce retiree contribution	0	0
Plan amendments	0	0
Actuarial (gain) loss	238	(28)
Exchange rate fluctuations	(188)	61
Benefits paid	(140)	(131)
Benefit obligation, end of year	2,706	2,684	2,676
Funded status and accrued benefit cost	$ (2,706)	$ (2,684)