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Equity (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Balance, December 31, 2012 |  |  | $ 181,389 |
Net earnings | 5,601 | 5,452 | 10,991 | 12,059
Balance, September 30, 2013 | 187,884 |  | 187,884 |
Common Stock [Member] |  |  |  |
Balance, December 31, 2012 |  |  | 10,831 |
Net earnings |  |  | 0 |
Foreign currency translation adjustments |  |  | 0 |
Pension liability adjustment, net of tax |  |  | 0 |
Cash dividends declared |  |  | 0 |
Cash dividends declared to noncontrolling interest |  |  | 0 |
Stock options exercised |  |  | 201 |
Stock-based compensation expense |  |  | 0 |
Income tax benefit from stock options exercised |  |  | 0 |
Shares purchased and retired |  |  | (195) |
Balance, September 30, 2013 | 10,837 |  | 10,837 |
Capital in Excess of Par Value [Member] |  |  |  |
Balance, December 31, 2012 |  |  | 26,184 |
Net earnings |  |  | 0 |
Foreign currency translation adjustments |  |  | 0 |
Pension liability adjustment, net of tax |  |  | 0 |
Cash dividends declared |  |  | 0 |
Cash dividends declared to noncontrolling interest |  |  | 0 |
Stock options exercised |  |  | 3,357 |
Stock-based compensation expense |  |  | 948 |
Income tax benefit from stock options exercised |  |  | 514 |
Shares purchased and retired |  |  | 0 |
Balance, September 30, 2013 | 31,003 |  | 31,003 |
Reinvested Earnings [Member] |  |  |  |
Balance, December 31, 2012 |  |  | 149,664 |
Net earnings |  |  | 10,797 |
Foreign currency translation adjustments |  |  | 0 |
Pension liability adjustment, net of tax |  |  | 0 |
Cash dividends declared |  |  | (3,896) |
Cash dividends declared to noncontrolling interest |  |  | 0 |
Stock options exercised |  |  | 0 |
Stock-based compensation expense |  |  | 0 |
Income tax benefit from stock options exercised |  |  | 0 |
Shares purchased and retired |  |  | (4,428) |
Balance, September 30, 2013 | 152,137 |  | 152,137 |
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |  |
Balance, December 31, 2012 |  |  | (12,514) |
Net earnings |  |  | 0 |
Foreign currency translation adjustments |  |  | (951) |
Pension liability adjustment, net of tax |  |  | 770 |
Cash dividends declared |  |  | 0 |
Cash dividends declared to noncontrolling interest |  |  | 0 |
Stock options exercised |  |  | 0 |
Stock-based compensation expense |  |  | 0 |
Income tax benefit from stock options exercised |  |  | 0 |
Shares purchased and retired |  |  | 0 |
Balance, September 30, 2013 | (12,695) |  | (12,695) |
Noncontrolling Interest [Member] |  |  |  |
Balance, December 31, 2012 |  |  | 7,224 |
Net earnings |  |  | 194 |
Foreign currency translation adjustments |  |  | (606) |
Pension liability adjustment, net of tax |  |  | 0 |
Cash dividends declared |  |  | 0 |
Cash dividends declared to noncontrolling interest |  |  | (210) |
Stock options exercised |  |  | 0 |
Stock-based compensation expense |  |  | 0 |
Income tax benefit from stock options exercised |  |  | 0 |
Shares purchased and retired |  |  | 0 |
Balance, September 30, 2013 | $ 6,602 |  | $ 6,602 |

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- Definition Amount of increase in additional paid in capital (APIC) resulting from a tax benefit associated with share-based compensation plan other than an employee stock ownership plan (ESOP). Includes, but is not limited to, excess tax benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: 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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 740 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6419406&loc=d3e23524-113945 + Details
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- Definition Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders. + References 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 + Details
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- Definition Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. + 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 (a) -URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -Subparagraph (b,c) -URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32211-110900 + Details
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=31814832&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=31814832&loc=SL4591551-111686 + Details
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- Definition Value of stock issued as a result of the exercise of stock options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: 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 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29-31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 + Details
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