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Note 7 - Employee Benefit Plans | 3 Months Ended
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Mar. 31, 2015
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 months ended March 31, 2015 and 2014 (in thousands):
|  | Three Months Ended March 31, |
|  | 2015 |  |  | 2014 |
Service cost |  | $ | 1,054 |  |  | $ | 1,020 |
Interest cost |  |  | 1,206 |  |  |  | 1,186 |
Expected return on plan assets |  |  | (1,345 | ) |  |  | (1,249 | )
Amortization of prior service benefit |  |  | (84 | ) |  |  | (84 | )
Amortization of net loss |  |  | 1,065 |  |  |  | 756 |
Net periodic benefit cost |  | $ | 1,896 |  |  | $ | 1,629 |
In January 2015, we contributed approximately $5.0 million in shares of our common stock to our defined benefit plans, with no additional contributions anticipated in 2015. We expect to contribute approximately $0.4 million to our unfunded supplemental executive retirement plan during 2015.

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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 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2410-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=49170332&loc=SL14450702-114947 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414199&loc=d3e39622-114963 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39675-114964 + Details
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