Short-Term Borrowings and Credit Lines (Narrative) (Details)
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12 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | |||||||||||||||||||
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Dec. 31, 2014
USD ($)
|
Dec. 31, 2014
Domestic [Member]
Unsecured And Uncommitted Line Of Credit [Member]
USD ($)
|
Dec. 31, 2013
Domestic [Member]
Unsecured And Uncommitted Line Of Credit [Member]
USD ($)
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Dec. 31, 2014
Canadian Subsidiary [Member]
Unsecured And Uncommitted Line Of Credit [Member]
USD ($)
|
Dec. 31, 2014
Canadian Subsidiary [Member]
Unsecured And Uncommitted Line Of Credit [Member]
CAD
|
Dec. 31, 2013
Canadian Subsidiary [Member]
Unsecured And Uncommitted Line Of Credit [Member]
USD ($)
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Dec. 31, 2014
European Subsidiary [Member]
USD ($)
|
Dec. 31, 2013
European Subsidiary [Member]
USD ($)
|
Dec. 31, 2014
European Subsidiary [Member]
Unsecured And Uncommitted Line Of Credit [Member]
USD ($)
|
Dec. 31, 2014
European Subsidiary [Member]
European Customs Guaranteed Line Of Credit [Member]
USD ($)
|
Dec. 31, 2014
European Subsidiary [Member]
Unsecured And Uncommitted Credit Line1 [Member]
EUR (€)
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Dec. 31, 2014
European Subsidiary [Member]
Unsecured And Uncommitted Credit Line2 [Member]
EUR (€)
|
Dec. 31, 2014
Japanese Subsidiary [Member]
Unsecured And Uncommitted Line Of Credit [Member]
USD ($)
|
Dec. 31, 2014
Japanese Subsidiary [Member]
Unsecured And Uncommitted Credit Line1 [Member]
USD ($)
|
Dec. 31, 2014
Japanese Subsidiary [Member]
Unsecured And Uncommitted Credit Line2 [Member]
JPY (¥)
|
Dec. 31, 2014
Japanese Subsidiary [Member]
Revolving Line Of Credit [Member]
USD ($)
|
Dec. 31, 2013
Japanese Subsidiary [Member]
Revolving Line Of Credit [Member]
USD ($)
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Dec. 31, 2014
Korean Subsidiary [Member]
USD ($)
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Dec. 31, 2013
Korean Subsidiary [Member]
USD ($)
|
Dec. 31, 2014
Korean Subsidiary [Member]
Unsecured And Uncommitted Line Of Credit [Member]
USD ($)
|
Dec. 31, 2014
Committed Portion Of Credit Facility [Member]
Domestic [Member]
|
Dec. 31, 2014
Minimum [Member]
Domestic [Member]
Committed Line Of Credit [Member]
|
Dec. 31, 2014
Maximum [Member]
Domestic [Member]
Committed Line Of Credit [Member]
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Line of Credit Facility [Line Items] | |||||||||||||||||||||||
Interest rate description | Canadian prime rate | Canadian prime rate | European Central Bank ("ECB") refinancing rate plus 50 basis points | Euro Overnight Index Average ("EONIA") plus 75 basis points | JPY LIBOR plus 100 basis points | Bank of Tokyo Prime Rate | CD rate plus 220 basis points | USD LIBOR plus 87.5 basis points | USD LIBOR plus 162.5 basis points | ||||||||||||||
Line of credit facility amount outstanding | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | |||||||||||||
Available credit amount | 125,000,000 | ||||||||||||||||||||||
Maturity date of agreement | Jul. 01, 2019 | ||||||||||||||||||||||
Maximum borrowing capacity | $ 25,815,000 | 30,000,000 | $ 37,261,000 | $ 2,782,000 | € 25,800,000 | € 5,000,000 | $ 9,505,000 | $ 7,000,000 | ¥ 300,000,000 | $ 20,000,000 |