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Quarterly Financial Data (Unaudited) | 12 Months Ended
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Dec. 31, 2011
Quarterly Financial Data (Unaudited) [Abstract] |
Quarterly Financial Information [Text Block] | QUARTERLY FINANCIAL DATA (Unaudited) Summarized quarterly financial data for 2011 and 2010 is presented below. Seasonal influences affect the Company’s sales and profits, with peak business occurring in May through August. (in thousands, except per share amounts)
| 2011 |  | 2010
| First | Second | Third | Fourth |  | First | Second | Third | Fourth
Sales | $ | 140,715 |  | $ | 160,824 |  | $ | 155,057 |  | $ | 146,997 |  |  | $ | 131,153 |  | $ | 138,069 |  | $ | 136,673 |  | $ | 132,653 |
Gross profit | 31,901 |  | 37,391 |  | 37,223 |  | 28,569 |  |  | 28,135 |  | 28,681 |  | 32,390 |  | 27,708 |
Net income | 5,667 |  | 8,914 |  | 10,056 |  | 7,433 |  |  | 3,993 |  | 4,870 |  | 8,150 |  | 4,104 |
Earnings per share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted | $ | 0.47 |  | $ | 0.74 |  | $ | 0.84 |  | $ | 0.62 |  |  | $ | 0.34 |  | $ | 0.41 |  | $ | 0.68 |  | $ | 0.34 |
Average shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted | 11,980 |  | 11,966 |  | 11,947 |  | 11,973 |  |  | 11,833 |  | 11,882 |  | 11,906 |  | 11,952 |
Dividends per share | .06 |  | .06 |  | .06 |  | .06 |  |  | .06 |  | .06 |  | .06 |  | .06 |
Market price of common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
High | $ | 29.27 |  | $ | 28.87 |  | $ | 25.05 |  | $ | 29.20 |  |  | $ | 20.36 |  | $ | 27.00 |  | $ | 25.41 |  | $ | 28.19 |
Low | $ | 25.32 |  | $ | 21.09 |  | $ | 20.35 |  | $ | 19.71 |  |  | $ | 16.62 |  | $ | 19.58 |  | $ | 18.68 |  | $ | 21.55 |
The sum of quarterly earnings per share may not equal total year earnings per share due to rounding of earnings per share amounts, and differences in weighted-average shares and equivalent shares outstanding for each of the periods presented. The third quarter 2010 results include a tax credit of $0.9 million relating to prior years research and development expenses. The fourth quarter 2011 results include the following items: (1) a pretax charge of $1.9 million related to goodwill impairment (2) a $7.7 million gain on bargain purchase relating to Tenco and (3) restructuring cost of $0.9 million relating to a plant closure.

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- Definition The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e725-108305 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 28 -Paragraph 23, 24 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e765-108305 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 28 -Paragraph 30 -Subparagraph a-j -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=6952194&loc=d3e1280-108306 + Details
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