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Nature of Operations and Summary of Significant Accounting Policies Narrative (Details)
In Thousands, unless otherwise specified |
12 Months Ended | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2011
USD ($)
customers
|
Dec. 31, 2010
USD ($)
|
Dec. 31, 2009
USD ($)
|
Dec. 31, 2011
Czech koruna against Euro [Member]
CZK
|
Dec. 31, 2011
Euro against U.S. dollar [Member]
EUR (€)
|
Dec. 31, 2011
Czech koruna against U.S. Dollar [Member]
CZK
|
Dec. 31, 2011
Japanese Yen against U.S. dollar [Member]
JPY (¥)
|
Dec. 31, 2010
Japanese Yen against U.S. dollar [Member]
JPY (¥)
|
Dec. 31, 2011
Euros against the Czech koruna [Member]
EUR (€)
|
Dec. 31, 2010
Euros against the Czech koruna [Member]
EUR (€)
|
Dec. 31, 2011
Norwegian kroner against euro [Member]
NOK
|
Dec. 31, 2011
British pounds against the U.S. dollar [Member]
GBP (£)
|
Dec. 31, 2010
U.S. dollars against the euro [Member]
USD ($)
|
Dec. 31, 2010
Austrailian dollars against the U.S. dollar [Member]
AUD
|
Dec. 31, 2010
British pounds against the euro [Member]
GBP (£)
|
Dec. 31, 2010
Foreign Exchange Forward [Member]
USD ($)
|
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| Minimum ownership percentage of investments in affiliates required to be accounted for under the equity method | 20.00% | |||||||||||||||
| Maximum ownership percentage of investments in affiliates required to be accounted for under the equity method | 50.00% | |||||||||||||||
| Minimum maturity duration of short-term, highly liquid variable-rate intruments | 3 months | |||||||||||||||
| Maximum maturity duration of short-term, highly liquid variable-rate intruments | 6 months | |||||||||||||||
| Foreign currency translation adjustments | $ 12,635 | $ 14,938 | ||||||||||||||
| Pension liability adjustments, net of taxes | (9,642) | (5,127) | ||||||||||||||
| Warranty expense | 7,420 | 5,893 | 3,316 | |||||||||||||
| Percentage of sales from foreign countries | 58.00% | 57.00% | 59.00% | |||||||||||||
| Number of top customers used for evaluation of credit risk of consolidated sales | 10 | |||||||||||||||
| Maximum percentage of consolidated sales attributable to one customer | 10.00% | 10.00% | 10.00% | |||||||||||||
| Percentage of sales from top ten customers | 36.00% | 38.00% | 47.00% | |||||||||||||
| Allowance for doubtful accounts | 2,360 | 3,008 | ||||||||||||||
| Inventory, Net [Abstract] | ||||||||||||||||
| Raw materials and supplies | 64,832 | 35,565 | ||||||||||||||
| Work in process | 36,045 | 23,643 | ||||||||||||||
| Finished goods | 48,945 | 45,227 | ||||||||||||||
| Inventories, net | 149,822 | 104,435 | ||||||||||||||
| Gain (loss) on foreign currency hedges | 1,233 | (630) | 1,492 | |||||||||||||
| Forward currency contract amounts | 17,500 | 11,500 | 4,700 | 130,000 | 386,853 | 3,340 | 16,900 | 3,000 | 250 | 5,000 | 500 | 75 | ||||
| Fair value of derivative assets | 489 | |||||||||||||||
| Fair value of derivative liability | 107 | 807 | ||||||||||||||
| Movement in Standard Product Warranty Accrual [Roll Forward] | ||||||||||||||||
| Balance at beginning of period | 12,101 | 8,764 | 8,636 | |||||||||||||
| Warranty usage | (8,085) | (3,827) | (4,335) | |||||||||||||
| Acquired warranty reserves | 1,745 | 1,271 | 1,147 | |||||||||||||
| Balance at end of period | 13,181 | 12,101 | 8,764 | |||||||||||||
| Pension liability adjustment taxes | (2,633) | (470) | ||||||||||||||
| Accumluated other comprehensive income | $ 2,993 | $ 9,811 | ||||||||||||||