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Note 7 - Employee Benefit Plans | 6 Months Ended
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Jun. 30, 2014
Compensation and Retirement Disclosure [Abstract] |
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 and six months ended June 30, 2014 and 2013 (in thousands):
|  | Three Months Ended June 30, |
|  | 2014 |  |  | 2013 |
Service cost |  | $ | 1,020 |  |  | $ | 1,058 |
Interest cost |  |  | 1,186 |  |  |  | 969 |
Expected return on plan assets |  |  | (1,249 | ) |  |  | (1,205 | )
Amortization of prior service cost |  |  | (84 | ) |  |  | 98 |
Amortization of net (gain) loss |  |  | 756 |  |  |  | 776 |
Net periodic pension cost |  | $ | 1,629 |  |  | $ | 1,696 |
|  | Six Months Ended June 30, |
|  | 2014 |  |  | 2013 |
Service cost |  | $ | 2,040 |  |  | $ | 2,115 |
Interest cost |  |  | 2,372 |  |  |  | 1,939 |
Expected return on plan assets |  |  | (2,498 | ) |  |  | (2,409 | )
Amortization of prior service cost |  |  | (168 | ) |  |  | 195 |
Amortization of net (gain) loss |  |  | 1,512 |  |  |  | 1,552 |
Net periodic pension cost |  | $ | 3,258 |  |  | $ | 3,392 |
In April and June 2014, we contributed aggregate principal amounts of $2.0 million and $3.0 million, respectively, of our Senior Notes to our defined benefit pension plan, and expect to contribute an additional $2.5 million aggregate principal amount, for a total of $7.5 million, in aggregate principal amount, over the course of 2014 (see Note 9 for more information). We expect to contribute approximately $0.3 million to our unfunded supplemental executive retirement plan in 2014.

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