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Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Selling, General and Administrative Expense, Total | $ 314,000 | $ 357,200 | $ 356,300
Cost of Goods and Services Sold, Total | 593,200 | 675,900 | 678,500
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax, Ending Balance | (19,100) | (36,300) | (31,900)
Restricted Cash and Cash Equivalents, Total | 600 | 500 |
Goodwill, Impairment Loss | 0 | 0 |
Goodwill, Ending Balance | $ 207,800 | 195,100 | 182,700
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares) | 1,392,892 |  |
Advertising Expense | $ 5,000 | $ 8,200 | $ 8,800
EMEA [Member] |  |  |
Goodwill, Ending Balance | $ 168,800 |  |
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount | 7.00% |  |
Minimum [Member] |  |  |
Warranty Term (Year) | 1 year |  |
Maximum [Member] |  |  |
Warranty Term (Year) | 4 years |  |
Building and Building Improvements [Member] |  |  |
Property, Plant and Equipment, Useful Life (Year) | 30 years |  |
Property, Plant and Equipment, Other Types [Member] | Minimum [Member] |  |  |
Property, Plant and Equipment, Useful Life (Year) | 3 years |  |
Property, Plant and Equipment, Other Types [Member] | Maximum [Member] |  |  |
Property, Plant and Equipment, Useful Life (Year) | 15 years |  |
Reclassification from Selling and Administrative Expense to Costs of Sales [Member] |  |  |
Selling, General and Administrative Expense, Total | $ (5,000) |  |
Cost of Goods and Services Sold, Total | $ 5,000 |  |

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