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Note 14 - Benefit Plans - Weighted-average Assumptions Used to Determine Benefit Obligations (Details) | Dec. 31, 2016 | Dec. 31, 2015
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Rate of compensation increase (1) | [1] |  |
Pension Plan [Member] |  |  |
Discount rate - pension plan |  | 4.14% | 4.36%
Other Pension Plan [Member] |  |  |
Discount rate - pension plan |  | 4.16% | 4.39%
[1] | No compensation increase was assumed as the plans were frozen effective December 31, 2008.

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- Definition The interest rate used to adjust for the time value of money for the plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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- Definition Expected rate of compensation increases (for pay-related plans). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(2) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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