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Income Taxes (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Income from continuing operations [Abstract] |  |  |
U.S. operations | $ 40,282 | $ 26,297 | $ 12,103
Foreign operations | 8,448 | 8,430 | (36,423)
Profit (Loss) Before Income Taxes | 48,730 | 34,727 | (24,320)
Current [Abstract] |  |  |
Federal | 10,321 | 6,756 | (337)
Foreign | 2,277 | 3,005 | 1,284
State | 1,450 | 1,214 | 236
Current Income Tax Expense (Benefit) | 14,048 | 10,975 | 1,183
Deferred [Abstract] |  |  |
Federal | 2,330 | (10,541) | 1,897
Foreign | (203) | (248) | (1,444)
State | (158) | (262) | 285
Deferred Income Tax Expense (Benefit) | 1,969 | (11,051) | 738
Total [Abstract] |  |  |
Federal | 12,651 | (3,785) | 1,560
Foreign | 2,074 | 2,757 | (160)
State | 1,292 | 952 | 521
Income Tax Expense (Benefit) | 16,017 | (76) | 1,921
Undistributed earnings of non-U.S. subsidiaries | 22,282 |  |
Operating Loss Carryforwards [Line Items] |  |  |
Foreign tax credit carry-forward | 8,554 |  |
Effective tax rate reconciliation [Abstract] |  |  |
Tax at statutory rate (in hundredths) | 35.00% | 35.00% | (35.00%)
State and local taxes, net of federal benefit (in hundredths) | 2.00% | 0.70% | 1.10%
Effect of foreign operations (in hundredths) | 0.50% | 0.50% | (7.00%)
International restructuring (in hundredths) | 0.00% | (31.40%) | (9.40%)
Goodwill impairment - non-deductible (in hundredths) | 0.00% | 0.00% | 56.90%
Effect of changes in valuation allowances (in hundredths) | 0.00% | 0.10% | (0.70%)
Domestic production activities deduction (in hundredths) | (1.60%) | (3.00%) | 0.80%
Other, net (in hundredths) | (3.00%) | (2.10%) | 1.20%
Effective income tax rate (in hundredths) | 32.90% | (0.20%) | 7.90%
Deferred tax assets [Abstract] |  |  |
Inventories, principally due to additional costs inventoried for tax purposes and changes in inventory reserves | 426 | 1,081 | 867
Employee wages and benefits, principally due to accruals for financial reporting purposes | 20,910 | 17,948 | 16,050
Warranty reserves accrued for financial reporting purposes | 2,625 | 2,175 | 1,803
Accounts receivable, principally due to allowance for doubtful accounts and tax accounting method for equipment rentals | 1,464 | 1,252 | 1,396
Tax loss carryforwards | 5,915 | 12,725 | 12,987
Valuation allowance | 3,229 | (9,170) | (9,131)
Tax credit carryforwards | 8,554 | 10,119 | 2,385
Other | 1,777 | 1,937 | 1,177
Total deferred tax assets | 38,442 | 38,067 | 27,534
Deferred tax liabilities [Abstract] |  |  |
Property, Plant and Equipment, principally due to differences in depreciation and related gains | 9,167 | 8,562 | 8,592
Goodwill and Intangible Assets | 7,093 | 8,390 | 9,086
Total deferred tax liabilities | 16,260 | 16,952 | 17,678
Net deferred tax assets | 22,182 | 21,115 | 9,856
Income Tax benefits relating to stock plans | 1,266 | 1,724 | 114
Income Tax benefits relating to ESOP and stock plans |  |  | 120
Reconciliation of unrecognized tax benefits [Roll Forward] |  |  |
Balance, Beginning of period | 5,272 |  |
Decreases as a result of tax positions taken during prior period | (765) |  |
Increases as a result of tax positions taken during the current year | 828 |  |
Decreases for tax positions related to acquired entities during a prior period | 0 |  |
Decreases relating to settlements with taxing authorities | (193) |  |
Reductions as a result of a lapse of the applicable statute of limitations | (1,551) |  |
Decreases as a result of foreign currency fluctuations | (167) |  |
Balance, End of period | 3,424 | 5,272 |
Unrecognized tax benefits that would impact effective tax rate | 3,209 |  |
Accrued interest and penalties | 427 |  |
Dutch [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss tax carry-forwards | 6,460 |  |
Germany [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss tax carry-forwards | $ 15,271 |  |

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