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Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2010 | Sep. 30, 2010 | Jun. 30, 2010 | Mar. 31, 2010 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Segment Reporting [Abstract] |  |  |  |  |  |  |  |  |  |  |
Number of operating segments | 4 |  |  |  |  |  |  |  | 4 |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales | $ 193,158 | $ 186,990 | $ 201,259 | $ 172,591 | $ 182,789 | $ 168,637 | $ 166,137 | $ 150,106 | $ 753,998 | $ 667,667 | $ 595,875
Long-lived assets | 133,428 |  |  |  | 137,067 |  |  |  | 133,428 | 137,067 | 151,802
Maximum percentage sales by single customer to consolidated net sales (in hundredths) |  |  |  |  |  |  |  |  | 10.00% |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales | 193,158 | 186,990 | 201,259 | 172,591 | 182,789 | 168,637 | 166,137 | 150,106 | 753,998 | 667,667 | 595,875
Equipment Sales [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 452,398 | 389,137 | 329,871
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 452,398 | 389,137 | 329,871
Parts and Consumables [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 177,999 | 160,994 | 151,932
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 177,999 | 160,994 | 151,932
Service and Other [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 100,650 | 96,828 | 95,046
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 100,650 | 96,828 | 95,046
Specialty Surface Coatings [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 22,951 | 20,708 | 19,026
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 22,951 | 20,708 | 19,026
Americas [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 481,426 | 424,462 | 366,034
Long-lived assets | 98,855 |  |  |  | 98,258 |  |  |  | 98,855 | 98,258 | 106,080
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 481,426 | 424,462 | 366,034
Europe, Middle East, Africa [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 188,338 | 172,619 | 177,829
Long-lived assets | 29,390 |  |  |  | 34,497 |  |  |  | 29,390 | 34,497 | 41,016
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 188,338 | 172,619 | 177,829
Asia Pacific [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 84,234 | 70,586 | 52,012
Long-lived assets | 5,183 |  |  |  | 4,312 |  |  |  | 5,183 | 4,312 | 4,706
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | $ 84,234 | $ 70,586 | $ 52,012

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 5 -Section 03 -Paragraph 1 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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- Definition Amount of net assets (total assets less total liabilities) attributed to the reportable segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 28 -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. + Details
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