LONG (Details)			9 Months Ended		9 Months Ended			9 Months Ended			9 Months Ended			9 Months Ended			9 Months Ended			9 Months Ended
	Sep. 30, 2012 USD ($)	Dec. 31, 2011 USD ($)	Sep. 30, 2012 2003 multi-currency uncommitted shelf facility, U.S. dollar denominated 1 [Member] USD ($)	Dec. 31, 2011 2003 multi-currency uncommitted shelf facility, U.S. dollar denominated 1 [Member] USD ($)	Sep. 30, 2012 2003 multi-currency uncommitted shelf facility, U.S. dollar denominated 2 [Member] USD ($)	Dec. 31, 2011 2003 multi-currency uncommitted shelf facility, U.S. dollar denominated 2 [Member] USD ($)	Sep. 30, 2012 2003 multi-currency uncommitted shelf facility, total U.S. dollar-denominated debt [Member] USD ($)	Sep. 30, 2012 2003 multi-currency uncommitted shelf facility, Japanese yen denominated 1 [Member] USD ($)	Sep. 30, 2012 2003 multi-currency uncommitted shelf facility, Japanese yen denominated 1 [Member] JPY (¥)	Dec. 31, 2011 2003 multi-currency uncommitted shelf facility, Japanese yen denominated 1 [Member] JPY (¥)	Sep. 30, 2012 2003 multi-currency uncommitted shelf facility, Japanese yen denominated 2 [Member]	Sep. 30, 2012 2003 multi-currency uncommitted shelf facility, Japanese yen denominated 2 [Member] JPY (¥)	Dec. 31, 2011 2003 multi-currency uncommitted shelf facility, Japanese yen denominated 2 [Member] USD ($)	Sep. 30, 2012 2003 multi-currency uncommitted shelf facility, Japanese yen denominated 3 [Member]	Sep. 30, 2012 2003 multi-currency uncommitted shelf facility, Japanese yen denominated 3 [Member] JPY (¥)	Dec. 31, 2011 2003 multi-currency uncommitted shelf facility, Japanese yen denominated 3 [Member] USD ($)	Sep. 30, 2012 2003 multi-currency uncommitted shelf facility, total Japanese yen-denominated debt [Member]	Sep. 30, 2012 2003 multi-currency uncommitted shelf facility, total Japanese yen-denominated debt [Member] JPY (¥)	Dec. 31, 2011 2003 multi-currency uncommitted shelf facility, total Japanese yen-denominated debt [Member] USD ($)	Sep. 30, 2012 2010 committed loan, U.S. dollar denominated [Member] USD ($)	Dec. 31, 2011 2010 committed loan, U.S. dollar denominated [Member] USD ($)	Sep. 30, 2012 Revcolving Credit Facility Member [Member] USD ($)	Dec. 31, 2011 Revcolving Credit Facility Member [Member] USD ($)	Sep. 30, 2012 Uncommitted Multi Currency Shelf Facility Member [Member] USD ($)
Debt Instrument [Line Items]
Original principal amount - facilities			$ 40,000,000		$ 20,000,000				¥ 3,100,000,000			¥ 2,300,000,000			¥ 2,200,000,000			¥ 8,000,000,000		$ 30,000,000		$ 0
Balance - facilities			22,900,000	28,600,000	14,300,000	17,100,000			900,000,000	1,300,000,000		1,600,000,000	1,900,000		1,500,000,000	1,900,000		8,000,000,000	0	20,000,000	24,000,000	0	0
Interest rate - facilities (in hundredths)			6.20%		6.20%			1.70%	1.70%		2.60%	2.60%		3.30%	3.30%		1.70%	1.70%
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 September 2017 with annual principal payments that began in September 2011.	Notes due September 2017 with annual principal payments that began in September 2011.		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 May 2022 with annual principal payments that begin in May 2016.	Notes due May 2022 with annual principal payments that begin in May 2016.		Amortizes at $0.5 million every 30 days.
Amortization per quarter																				12,400
Current portion of long-term debt	$ 28,926,000	$ 28,608,000					$ 8,600,000	$ 13,800,000																$ 6,500,000