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Note 4 - Retirement Plans | 9 Months Ended
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Sep. 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 nine-month periods ended September 30, 2013 and 2012, respectively (in thousands):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Service cost |  | $ | 1,291 |  |  | $ | 1,243 |  |  | $ | 3,871 |  |  | $ | 3,538 |
Interest cost |  |  | 967 |  |  |  | 899 |  |  |  | 2,899 |  |  |  | 2,559 |
Expected return on plan assets |  |  | (926 | ) |  |  | (739 | ) |  |  | (2,774 | ) |  |  | (2,104 | )
Loss amortization |  |  | 824 |  |  |  | 624 |  |  |  | 2,468 |  |  |  | 1,775 |
Net periodic benefit cost |  | $ | 2,156 |  |  | $ | 2,027 |  |  | $ | 6,464 |  |  | $ | 5,768 |
During the nine-month period ended September 30, 2013, we contributed $3.7 million to our pension plans. During the remainder of the year ending December 31, 2013, we expect to contribute an additional $1.7 million to $4.3 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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