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Note 4 - Retirement Plans | 6 Months Ended
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Jun. 30, 2013
Compensation and Retirement Disclosure [Abstract] |
Pension and Other Postretirement Benefits Disclosure [Text Block] | 4. Retirement Plans The following table provides the components of net periodic benefit cost for our pension plans for the three-month and six-month periods ended June 30, 2013 and 2012, respectively (in thousands):
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Service cost |  | $ | 1,325 |  |  | $ | 1,147 |  |  | $ | 2,649 |  |  | $ | 2,295 |
Interest cost |  |  | 917 |  |  |  | 830 |  |  |  | 1,834 |  |  |  | 1,660 |
Expected return on plan assets |  |  | (830 | ) |  |  | (682 | ) |  |  | (1,659 | ) |  |  | (1,365 | )
Loss amortization |  |  | 742 |  |  |  | 576 |  |  |  | 1,484 |  |  |  | 1,151 |
Net periodic benefit cost |  | $ | 2,154 |  |  | $ | 1,871 |  |  | $ | 4,308 |  |  | $ | 3,741 |
During the six-month period ended June 30, 2013, we contributed $2.6 million to our pension plans. During the remainder of the year ending December 31, 2013, we expect to contribute an additional $2.8 million to $5.4 million to our pension plans.

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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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