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Divestitures (Details) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2012 USD ($) | Sep. 30, 2011 USD ($) | Sep. 30, 2012 USD ($) | Sep. 30, 2011 USD ($) | Sep. 30, 2012 Tennant CEE GmbH and OOO Tennant [Member] USD ($) | Sep. 30, 2012 Tennant CEE GmbH and OOO Tennant [Member] EUR (€) | Jul. 31, 2012 Tennant CEE GmbH and OOO Tennant [Member] USD ($)
Divestitures [Line Items] |  |  |  |  |  |  |
Date of Divestiture |  |  |  |  | Jul. 31, 2012 | Jul. 31, 2012 |
Total Selling Price |  |  |  |  |  | € 6,166 |
Cash Received as Part of Selling Price |  |  |  |  | 1,014 | 815 |
Total Amount of Installment Payments to be Received Quarterly in 2013 |  |  |  |  | 2,738 | 2,126 |
Total Amount of Installment Payments to be Received on First, Second and Third Anniversary Dates |  |  |  |  | 4,153 | 3,225 |
Gain on Sale of Business | 784 | 0 | 784 | 0 | 784 |  |
Assets and Liabilities Divested [Abstract] |  |  |  |  |  |  |
Accounts Receivable |  |  |  |  |  |  | 4,398
Inventory |  |  |  |  |  |  | 4,271
Other Current Assets |  |  |  |  |  |  | 87
Current Assets |  |  |  |  |  |  | 8,756
Property, Plant and Equipment |  |  |  |  |  |  | 170
Total Assets Divested |  |  |  |  |  |  | 8,926
Current Liabilities |  |  |  |  |  |  | 1,121
Total Liabilities Divested |  |  |  |  |  |  | 1,121
Net Assets Divested |  |  |  |  |  |  | $ 7,805

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