Pension and Postretirement Benefits (Details 5) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Expected future service expected to be paid
Medicare Part D Subsidy Receipts, 2013	$ 268
Medicare Part D Subsidy Receipts, 2014	272
Medicare Part D Subsidy Receipts, 2015	273
Medicare Part D Subsidy Receipts, 2016	273
Medicare Part D Subsidy Receipts, 2017	271
Medicare Part D Subsidy Receipts, 2018-2022	1,267
Funded Plans [Member]
Expected future service expected to be paid
2013	784
2014	762
2015	791
2016	737
2017	774
2018-2022	4,200
Unfunded Pension Plans [Member]
Expected future service expected to be paid
2013	832
2014	810
2015	795
2016	771
2017	794
2018-2022	4,181
Postretirement Benefit Plans [Member]
Expected future service expected to be paid
2013	1,768
2014	1,760
2015	1,744
2016	1,719
2017	1,647
2018-2022	7,434
Foreign Pension Plans [Member] | Funded Plans [Member]
Expected future service expected to be paid
2013	385
2014	492
2015	612
2016	616
2017	619
2018-2022	3,707
Foreign Pension Plans [Member] | Unfunded Pension Plans [Member]
Expected future service expected to be paid
2013	219
2014	218
2015	218
2016	217
2017	216
2018-2022	$ 1,066