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Defined Benefit Plans | 6 Months Ended
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Jun. 30, 2012
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract] |
Defined Benefit Plans | Defined Benefit Plans Net periodic pension and postretirement benefit costs for the Company's defined benefit pension plans and postretirement benefit plans cover forei gn employees, union hourly employees and certain salaried employees. The components of net periodic pension and postretirement be nefit costs for the three and six months ended June 30, 2012 and 2011 are as follows:
|  | Pension Plans |  | Other Postretirement Benefits
|  | Three months ended June 30, |  | Six months ended June 30, |  | Three months ended June 30, |  | Six months ended June 30,
|  | 2012 |  | 2011 |  | 2012 |  | 2011 |  | 2012 |  | 2011 |  | 2012 |  | 2011
|  | (dollars in thousands)
Service costs |  | $ | 150 |  |  | $ | 160 |  |  | $ | 300 |  |  | $ | 320 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest costs |  | 400 |  |  | 400 |  |  | 800 |  |  | 800 |  |  | 10 |  |  | 10 |  |  | 20 |  |  | 20 |
Expected return on plan assets |  | (420 | ) |  | (410 | ) |  | (850 | ) |  | (810 | ) |  | — |  |  | — |  |  | — |  |  | — |
Amortization of prior service cost |  | 10 |  |  | 10 |  |  | 10 |  |  | 10 |  |  | (60 | ) |  | (60 | ) |  | (130 | ) |  | (130 | )
Amortization of net (gain)/loss |  | 260 |  |  | 170 |  |  | 530 |  |  | 350 |  |  | (20 | ) |  | (20 | ) |  | (40 | ) |  | (40 | )
Net periodic benefit cost |  | $ | 400 |  |  | $ | 330 |  |  | $ | 790 |  |  | $ | 670 |  |  | $ | (70 | ) |  | $ | (70 | ) |  | $ | (150 | ) |  | $ | (150 | )
The Company contributed approximately $0.5 million and $4.5 million to its defined benefit pension plans during the three and six months ended June 30, 2012, respectively. The Company expects to contribute approximately $5.8 million to its defined benefit pension plans for the full year 2012.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 7, 21, 22 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS106-2 -Paragraph 20, 21, 22 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Implementation Guide (Q and A) -Number FAS88 -Paragraph 63 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5, 6, 7, 8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 8 -Subparagraph m -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 30 -Paragraph 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. 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