Pensions and Other Postretirement Benefit Plans (Schedule of Plan Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, beginning of year	$ 304,658	$ 262,376
Actual return on plan assets, net of expenses	19,493	34,176
Employer contributions	110,172	37,174
Plan participants' contributions	344	387
Benefits paid	(14,909)	(26,598)
Settlements	(249,709)	(891)
Foreign currency changes	3,385	(2,002)
Fair value of plan assets, end of year	173,434	304,658
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, beginning of year
Actual return on plan assets, net of expenses
Employer contributions	4,961	5,823
Plan participants' contributions	817	1,319
Benefits paid	(5,778)	(7,142)
Settlements
Foreign currency changes
Fair value of plan assets, end of year