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Defined Benefit Plans | 6 Months Ended
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Jun. 30, 2014
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 six months ended June 30, 2014 and 2013 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,
|  | 2014 |  | 2013 |  | 2014 |  | 2013 |  | 2014 |  | 2013 |  | 2014 |  | 2013
|  | (dollars in thousands)
Service costs |  | $ | 190 |  |  | $ | 170 |  |  | $ | 380 |  |  | $ | 350 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest costs |  | 440 |  |  | 410 |  |  | 880 |  |  | 820 |  |  | 10 |  |  | 10 |  |  | 20 |  |  | 20 |
Expected return on plan assets |  | (520 | ) |  | (460 | ) |  | (1,040 | ) |  | (920 | ) |  | — |  |  | — |  |  | — |  |  | — |
Amortization of prior service cost |  | 10 |  |  | 10 |  |  | 10 |  |  | 10 |  |  | — |  |  | — |  |  | — |  |  | — |
Amortization of net (gain)/loss |  | 280 |  |  | 320 |  |  | 560 |  |  | 640 |  |  | (30 | ) |  | (20 | ) |  | (50 | ) |  | (40 | )
Net periodic benefit cost |  | $ | 400 |  |  | $ | 450 |  |  | $ | 790 |  |  | $ | 900 |  |  | $ | (20 | ) |  | $ | (10 | ) |  | $ | (30 | ) |  | $ | (20 | )
The Company contributed approximately $0.5 million and $1.0 million to its defined benefit pension plans during the three and six months ended June 30, 2014, respectively. The Company expects to contribute approximately $2.3 million to its defined benefit pension plans for the full year 2014.

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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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