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Note G - Allocation of Plan Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Plan Fair Value Assets	$ 16,908	$ 17,819
Plan Fair Value Assets, Percentage	25.00%	23.00%
Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Plan Fair Value Assets	$ 1,468	$ 2,169
Plan Fair Value Assets, Percentage	2.00%	3.00%
Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Plan Fair Value Assets	$ 41,984	$ 47,716
Plan Fair Value Assets, Percentage	62.00%	63.00%
Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Plan Fair Value Assets	$ 3,476	$ 3,598
Plan Fair Value Assets, Percentage	5.00%	5.00%
Cash [Member] | Fair Value, Inputs, Level 1 [Member]
Plan Fair Value Assets	$ 1,011	$ 1,901
Plan Fair Value Assets, Percentage	1.00%	3.00%
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Plan Fair Value Assets	$ 3,428	$ 2,362
Plan Fair Value Assets, Percentage	5.00%	3.00%
Fair Value, Inputs, Level 1 [Member]
Plan Fair Value Assets	$ 22,863	$ 25,487
Plan Fair Value Assets, Percentage	33.00%	34.00%
Fair Value, Inputs, Level 2 [Member]
Plan Fair Value Assets	$ 45,412	$ 50,078
Plan Fair Value Assets, Percentage	67.00%	66.00%
Fair Value, Inputs, Level 3 [Member]
Plan Fair Value Assets
Plan Fair Value Assets, Percentage
Plan Fair Value Assets	$ 68,275	$ 75,565
Plan Fair Value Assets, Percentage	100.00%	100.00%

X

- Definition

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 30
-Section 35
-Paragraph 50
-URI http://asc.fasb.org/extlink&oid=49178875&loc=d3e12355-114930

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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X

- Definition

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.

+ References

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=58740216&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=58740216&loc=d3e1928-114920

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