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Defined Benefit Plans | 9 Months Ended
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Sep. 30, 2013
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 certain foreign employees, union hourly employees and salaried employees. The components of net periodic pension and postretirement benefit costs for the three and nine months ended September 30, 2013 and 2012 are as follows:
|  | Pension Plans |  | Other Postretirement Benefits
|  | Three months ended September 30, |  | Nine months ended September 30, |  | Three months ended September 30, |  | Nine months ended September 30,
|  | 2013 |  | 2012 |  | 2013 |  | 2012 |  | 2013 |  | 2012 |  | 2013 |  | 2012
|  | (dollars in thousands)
Service costs |  | $ | 170 |  |  | $ | 150 |  |  | $ | 520 |  |  | $ | 450 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest costs |  | 410 |  |  | 410 |  |  | 1,230 |  |  | 1,210 |  |  | 10 |  |  | 20 |  |  | 30 |  |  | 40 |
Expected return on plan assets |  | (460 | ) |  | (430 | ) |  | (1,380 | ) |  | (1,280 | ) |  | — |  |  | — |  |  | — |  |  | — |
Amortization of prior service cost |  | — |  |  | — |  |  | 10 |  |  | 10 |  |  | — |  |  | (70 | ) |  | — |  |  | (200 | )
Settlement/curtailment (gain) |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (1,490 | ) |  | — |  |  | (1,490 | )
Amortization of net (gain)/loss |  | 320 |  |  | 260 |  |  | 960 |  |  | 790 |  |  | (20 | ) |  | (20 | ) |  | (60 | ) |  | (60 | )
Net periodic benefit cost |  | $ | 440 |  |  | $ | 390 |  |  | $ | 1,340 |  |  | $ | 1,180 |  |  | $ | (10 | ) |  | $ | (1,560 | ) |  | $ | (30 | ) |  | $ | (1,710 | )
During the third quarter of 2012, the Company recognized previously deferred gains associated with one of the Company's postretirement benefit plans of approximately $1.5 million as a result of not having any remaining eligible participants. This benefit is included in selling, general and administrative expenses in the accompanying consolidated statement of income. The Company contributed approximately $0.7 million and $2.6 million to its defined benefit pension plans during the three and nine months ended September 30, 2013, respectively. The Company expects to contribute approximately $3.0 million to its defined benefit pension plans for the full year 2013.

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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 Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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