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Note 7. Employee Benefit Plans | 3 Months Ended
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Mar. 31, 2012
Pension and Other Postretirement Benefits Disclosure [Text Block] | Note 7. Employee Benefit Plans We sponsor defined benefit pension plans covering substantially all U.S. employees. Net periodic pension cost for the plans consisted of the following for the three months ended March 31, 2012 and 2011 (in thousands):
|  | Three Months Ended March 31,
|  | Pension Benefits |  | Other Benefits
|  | 2012 |  | 2011 |  | 2012 |  | 2011
Service cost |  | $ | 993 |  |  | $ | 969 |  |  | $ | 17 |  |  | $ | 14 |
Interest cost |  | 1,017 |  |  | 1,028 |  |  | 19 |  |  | 19 |
Expected return on plan assets |  | (1,145 | ) |  | (1,370 | ) |  | — |  |  | — |
Amortization of prior service cost |  | 100 |  |  | 101 |  |  | 11 |  |  | 11 |
Amortization of net (gain) loss |  | 707 |  |  | 220 |  |  | (7 | ) |  | (11 | )
Net periodic benefit cost |  | $ | 1,672 |  |  | $ | 948 |  |  | $ | 40 |  |  | $ | 33 |
The increased service costs in 2012 versus 2011 were driven primarily by higher staffing and compensation levels. We expect to contribute $2.0 million to the pension plans during 2012. As of March 31, 2012, the company has made no contributions.

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