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Note 8 - Employee Benefit Plans | 9 Months Ended
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Sep. 30, 2018
Notes to Financial Statements |
Pension and Other Postretirement Benefits Disclosure [Text Block] | Note 8. 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 nine months ended September 30, 2018 and 2017 (in thousands):
|  | Three Months Ended September 30, |
|  | 2018 |  |  | 2017 |
Service cost |  | $ | 1,252 |  |  | $ | 1,196 |
Interest cost |  |  | 1,377 |  |  |  | 1,339 |
Expected return on plan assets |  |  | (1,634 | ) |  |  | (1,462 | )
Amortization of prior service cost |  |  | 15 |  |  |  | (84 | )
Amortization of net loss |  |  | 931 |  |  |  | 1,033 |
Net periodic pension cost |  | $ | 1,941 |  |  | $ | 2,022 |
|  | Nine Months Ended September 30, |
|  | 2018 |  |  | 2017 |
Service cost |  | $ | 3,756 |  |  | $ | 3,588 |
Interest cost |  |  | 4,131 |  |  |  | 4,017 |
Expected return on plan assets |  |  | (4,902 | ) |  |  | (4,386 | )
Amortization of prior service cost |  |  | 45 |  |  |  | (252 | )
Amortization of net loss |  |  | 2,793 |  |  |  | 3,099 |
Net periodic pension cost |  | $ | 5,823 |  |  | $ | 6,066 |
For the three - and nine -month periods ended September 30, 2018, the service cost component of net periodic pension cost is included in the same line items of our condensed consolidated financial statements as other employee compensation costs, and the net expense of $0.7 million and $2.1 million, respectively, related to all other components of net periodic pension cost is included in other (expense) income on our condensed consolidated statements of operations and comprehensive income (loss). For the three - and nine -month periods ended September 30, 2017, all components of net periodic pension cost are included in the same line items of our condensed consolidated financial statements as other employee compensation costs. In April 2018 and July 2018, we made cash contributions of $1.3 million and $1.2 million, respectively, to our defined benefit plans. In September 2018 we contributed $5.5 million in shares of our common stock. We are not required to make additional contributions to our defined benefit plans in 2018. We expect to contribute approximately $0.5 illion to our unfunded supplemental executive retirement plan during 2018.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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