Pension and Postretirement Benefits (Details 4) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Domestic Pension Plans [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	$ 10,624	$ 9,846
Domestic Pension Plans [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	10,401	72
Domestic Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	223	9,774
Domestic Pension Plans [Member] | Significant Unobserved Inputs (Level 3) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
Postretirement Benefit Plans [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	1,397	2,118	2,678
Postretirement Benefit Plans [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	1,397	222
Postretirement Benefit Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans		1,896
Postretirement Benefit Plans [Member] | Significant Unobserved Inputs (Level 3) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
Foreign Pension Plans [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	12,997	11,028
Foreign Pension Plans [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	12,620	10,672
Foreign Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	377	356
Foreign Pension Plans [Member] | Significant Unobserved Inputs (Level 3) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
U.S. equity securities [Member] | Domestic Pension Plans [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans		2,849
U.S. equity securities [Member] | Domestic Pension Plans [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
U.S. equity securities [Member] | Domestic Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans		2,849
U.S. equity securities [Member] | Domestic Pension Plans [Member] | Significant Unobserved Inputs (Level 3) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
U.S. equity securities [Member] | Postretirement Benefit Plans [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans		283
U.S. equity securities [Member] | Postretirement Benefit Plans [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
U.S. equity securities [Member] | Postretirement Benefit Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans		283
U.S. equity securities [Member] | Postretirement Benefit Plans [Member] | Significant Unobserved Inputs (Level 3) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
U.S. equity securities [Member] | Foreign Pension Plans [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	1,185	977
U.S. equity securities [Member] | Foreign Pension Plans [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	1,185	977
U.S. equity securities [Member] | Foreign Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
U.S. equity securities [Member] | Foreign Pension Plans [Member] | Significant Unobserved Inputs (Level 3) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
International equity securities [Member] | Domestic Pension Plans [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans		914
International equity securities [Member] | Domestic Pension Plans [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
International equity securities [Member] | Domestic Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans		914
International equity securities [Member] | Domestic Pension Plans [Member] | Significant Unobserved Inputs (Level 3) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
International equity securities [Member] | Postretirement Benefit Plans [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans		89
International equity securities [Member] | Postretirement Benefit Plans [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
International equity securities [Member] | Postretirement Benefit Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans		89
International equity securities [Member] | Postretirement Benefit Plans [Member] | Significant Unobserved Inputs (Level 3) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
International equity securities [Member] | Foreign Pension Plans [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	4,871	3,995
International equity securities [Member] | Foreign Pension Plans [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	4,494	3,639
International equity securities [Member] | Foreign Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	377	356
International equity securities [Member] | Foreign Pension Plans [Member] | Significant Unobserved Inputs (Level 3) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
Aggregate fixed income securities [Member] | Domestic Pension Plans [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans		2,373
Aggregate fixed income securities [Member] | Domestic Pension Plans [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
Aggregate fixed income securities [Member] | Domestic Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans		2,373
Aggregate fixed income securities [Member] | Domestic Pension Plans [Member] | Significant Unobserved Inputs (Level 3) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
Aggregate fixed income securities [Member] | Postretirement Benefit Plans [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans		1,034
Aggregate fixed income securities [Member] | Postretirement Benefit Plans [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
Aggregate fixed income securities [Member] | Postretirement Benefit Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans		1,034
Aggregate fixed income securities [Member] | Postretirement Benefit Plans [Member] | Significant Unobserved Inputs (Level 3) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
Long-term fixed income securities [Member] | Domestic Pension Plans [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans		3,412
Long-term fixed income securities [Member] | Domestic Pension Plans [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
Long-term fixed income securities [Member] | Domestic Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans		3,412
Long-term fixed income securities [Member] | Domestic Pension Plans [Member] | Significant Unobserved Inputs (Level 3) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
Long-term fixed income securities [Member] | Postretirement Benefit Plans [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans		490
Long-term fixed income securities [Member] | Postretirement Benefit Plans [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
Long-term fixed income securities [Member] | Postretirement Benefit Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans		490
Long-term fixed income securities [Member] | Postretirement Benefit Plans [Member] | Significant Unobserved Inputs (Level 3) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
Cash [Member] | Domestic Pension Plans [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	10,401	72
Cash [Member] | Domestic Pension Plans [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	10,401	72
Cash [Member] | Domestic Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
Cash [Member] | Domestic Pension Plans [Member] | Significant Unobserved Inputs (Level 3) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
Cash [Member] | Postretirement Benefit Plans [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	1,397	222
Cash [Member] | Postretirement Benefit Plans [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans		222
Cash [Member] | Postretirement Benefit Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
Cash [Member] | Postretirement Benefit Plans [Member] | Significant Unobserved Inputs (Level 3) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
Other[Member] | Domestic Pension Plans [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	223	226
Other[Member] | Domestic Pension Plans [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
Other[Member] | Domestic Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	223	226
Other[Member] | Domestic Pension Plans [Member] | Significant Unobserved Inputs (Level 3) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
Other[Member] | Foreign Pension Plans [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	197	81
Other[Member] | Foreign Pension Plans [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	197	81
Other[Member] | Foreign Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
Other[Member] | Foreign Pension Plans [Member] | Significant Unobserved Inputs (Level 3) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
Canadian Fixed Income Securities [Member] | Foreign Pension Plans [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	6,744	5,975
Canadian Fixed Income Securities [Member] | Foreign Pension Plans [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans	6,744	5,975
Canadian Fixed Income Securities [Member] | Foreign Pension Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans
Canadian Fixed Income Securities [Member] | Foreign Pension Plans [Member] | Significant Unobserved Inputs (Level 3) [Member]
Fair value of the domestic plans assets by asset class
Fair value measurement domestic pension plans