Consolidated Statements of Shareholders' Equity (Parentheticals) - USD ($)	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Retained Earnings [Member]
Cash dividends declared, per share (in dollars per share)	$ (0.34)	$ 0.315	$ 0.285
Cash dividends declared, per share (in dollars per share)	$ 0.34	$ (0.315)	$ (0.285)
AOCI Attributable to Parent [Member]
Cash flow hedges, taxes	$ 24,000	$ 20,000	$ 21,000
Pensions, taxes	97,000	$ 339,000	$ 1,546,000
Change in currency translation adjustment, taxes	$ 41,000

Aggregate dividends declared during the period for each share of common stock outstanding.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669646-108580

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 220
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-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e640-108580

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