Note 12 - Pension and Other Postretirement Benefit Plans (Details) - The Retirement Plan’s Weighted Average Asset Allocations (Retirement Plan [Member])	Dec. 31, 2013	Dec. 31, 2012
Equity Securities [Member]
Note 12 - Pension and Other Postretirement Benefit Plans (Details) - The Retirement Plan’s Weighted Average Asset Allocations [Line Items]
Weighted average asset allocation	69.00%	64.00%
Debt Securities [Member]
Note 12 - Pension and Other Postretirement Benefit Plans (Details) - The Retirement Plan’s Weighted Average Asset Allocations [Line Items]
Weighted average asset allocation	31.00%	36.00%

Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)(1)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

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