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LONG (Details)
9 Months Ended9 Months Ended
Sep. 30, 2011
USD ($)
Dec. 31, 2010
USD ($)
Sep. 30, 2011
2003 multi-currency uncommitted shelf facility, U.S. dollar denominated 1 [Member]
USD ($)
Sep. 30, 2011
2003 multi-currency uncommitted shelf facility, U.S. dollar denominated 2 [Member]
USD ($)
Sep. 30, 2011
2003 multi-currency uncommitted shelf facility, Japanese yen denominated 1 [Member]
USD ($)
Sep. 30, 2011
2003 multi-currency uncommitted shelf facility, Japanese yen denominated 1 [Member]
JPY (¥)
Sep. 30, 2011
2003 multi-currency uncommitted shelf facility, Japanese yen denominated 3 [Member]
USD ($)
Sep. 30, 2011
2003 multi-currency uncommitted shelf facility, Japanese yen denominated 3 [Member]
JPY (¥)
Sep. 30, 2011
2003 multi-currency uncommitted shelf facility, total Japanese yen-denominated debt [Member]
USD ($)
Sep. 30, 2011
2003 multi-currency uncommitted shelf facility, Total [Member]
USD ($)
Sep. 30, 2011
2010 committed loan, U.S. dollar denominated [Member]
USD ($)
Sep. 30, 2011
Multi Currency Uncommitted Shelf Facility Japanese Yen Denominated 2 Member [Member]
USD ($)
Sep. 30, 2011
Multi Currency Uncommitted Shelf Facility Japanese Yen Denominated 2 Member [Member]
JPY (¥)
Sep. 30, 2011
Revcolving Credit Facility Member [Member]
USD ($)
Sep. 30, 2011
Uncommitted Multi Currency Shelf Facility Member [Member]
USD ($)
Debt Instrument [Line Items]               
Original principal amount - facilities  $ 40,000,000$ 20,000,000 ¥ 3,100,000,000 ¥ 2,200,000,000 $ 205,000,000  ¥ 2,300,000,000$ 25,000,000 
Balance - facilities  28,600,00017,100,00017,500,0001,300,000,00024,100,0001,900,000,000   25,200,0001,900,000,0000 
Interest rate - facilities (in hundredths)  6.20%6.20%1.70%1.70%3.30%3.30%   2.60%2.60%  
Repayment terms  Notes due July 2016, with annual principal payments that began in July 2010
Notes due January 2017, with annual principal payments that began in January 2011.
Notes due April 2014, with annual principal payments that began in April 2008.
Notes due April 2014, with annual principal payments that began in April 2008.
Notes due January 2017, with annual principal payments that began in January 2011.
Notes due January 2017, with annual principal payments that began in January 2011.
   
Notes due September 2017, with annual principal payments that began September 2011.
Notes due September 2017, with annual principal payments that began September 2011.
  
Original principal amount - other borrowings          30,000,000    
Balance - other borrowings          25,500,000    
Interest rate description - other borrowings          Variable 30 day    
Interest rate - other borrowings (in hundredths)          1.25%    
Amortization per quarter          1,500,000    
Percentage of outstanding stock of material foreign subsidiaries pledged as security (in hundredths)         65.00%65.00%  65.00% 
Current portion of long-term debt$ 28,586,000$ 27,865,000      $ 10,000,000 $ 6,000,000   $ 12,600,000