LONG (Details)			3 Months Ended		3 Months Ended			3 Months Ended				3 Months Ended				3 Months Ended					3 Months Ended		3 Months Ended		3 Months Ended
	Mar. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Mar. 31, 2013 Multi-currency uncommitted shelf facility, U.S. dollar denominated 1 [Member] USD ($)	Dec. 31, 2012 Multi-currency uncommitted shelf facility, U.S. dollar denominated 1 [Member] USD ($)	Mar. 31, 2013 Multi-currency uncommitted shelf facility, U.S. dollar denominated 2 [Member] USD ($)	Dec. 31, 2012 Multi-currency uncommitted shelf facility, U.S. dollar denominated 2 [Member] USD ($)	Mar. 31, 2013 Multi-currency uncommitted shelf facility, total U.S. dollar-denominated debt [Member] USD ($)	Mar. 31, 2013 Multi-currency uncommitted shelf facility, Japanese yen denominated 1 [Member] USD ($)	Mar. 31, 2013 Multi-currency uncommitted shelf facility, Japanese yen denominated 1 [Member] JPY (¥)	Dec. 31, 2012 Multi-currency uncommitted shelf facility, Japanese yen denominated 1 [Member] USD ($)	Dec. 31, 2012 Multi-currency uncommitted shelf facility, Japanese yen denominated 1 [Member] JPY (¥)	Mar. 31, 2013 Multi-currency uncommitted shelf facility, Japanese yen denominated 2 [Member] USD ($)	Mar. 31, 2013 Multi-currency uncommitted shelf facility, Japanese yen denominated 2 [Member] JPY (¥)	Dec. 31, 2012 Multi-currency uncommitted shelf facility, Japanese yen denominated 2 [Member] USD ($)	Dec. 31, 2012 Multi-currency uncommitted shelf facility, Japanese yen denominated 2 [Member] JPY (¥)	Mar. 31, 2013 Multi-currency uncommitted shelf facility, Japanese yen denominated 3 [Member] USD ($)	Mar. 31, 2013 Multi-currency uncommitted shelf facility, Japanese yen denominated 3 [Member] JPY (¥)	Dec. 31, 2012 Multi-currency uncommitted shelf facility, Japanese yen denominated 3 [Member] USD ($)	Dec. 31, 2012 Multi-currency uncommitted shelf facility, Japanese yen denominated 3 [Member] JPY (¥)	Mar. 31, 2013 Multi-currency uncommitted shelf facility, total Japanese yen-denominated debt [Member] USD ($)	Mar. 31, 2013 Committed loan, U.S. dollar denominated [Member] USD ($)	Dec. 31, 2012 Committed loan, U.S. dollar denominated [Member] USD ($)	Mar. 31, 2013 Revolving credit facility, [Member] USD ($)	Dec. 31, 2012 Revolving credit facility, [Member] USD ($)	Mar. 31, 2013 Multi-currency uncommitted shelf facility Japanese Yen Denominated 4 [Member] USD ($)	Mar. 31, 2013 Multi-currency uncommitted shelf facility Japanese Yen Denominated 4 [Member] JPY (¥)	Dec. 31, 2012 Multi-currency uncommitted shelf facility Japanese Yen Denominated 4 [Member] USD ($)	Dec. 31, 2012 Multi-currency uncommitted shelf facility Japanese Yen Denominated 4 [Member] JPY (¥)
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				$ 30,000,000		$ 20,000,000			¥ 8,000,000,000
Balance - facilities			22,900,000	22,900,000	11,400,000	14,300,000		9,500,000	900,000,000	10,200,000	900,000,000	17,200,000	1,600,000,000	18,700,000	1,600,000,000	13,200,000	1,200,000,000	17,900,000	1,600,000,000		16,500,000	18,000,000	20,000,000	0	84,600,000	8,000,000,000	92,000,000	8,000,000,000
Interest rate - facilities (in hundredths)			6.20%		6.20%			1.70%	1.70%			2.60%	2.60%			3.30%	3.30%				121.00%		71.00%		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.						Revolving line of credit.		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.
Interest rate description - other borrowings																					Variable 30 day: 1.21%		Variable 30 day: 0.71%
Amortization per 30 days																					500,000
Current portion of long-term debt	$ 56,531,000	$ 39,019,000					$ 8,600,000													$ 11,500,000	$ 16,400,000		$ 20,000,000