CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL POSITION
Trade receivables, short-term, allowance for doubtful accounts (in dollars)	$ 6,132	$ 8,211
Financed receivables, short-term, allowance for doubtful accounts (in dollars)	1,767	1,842
Financed receivables, long-term, allowance for doubtful accounts (in dollars)	$ 1,433	$ 1,408
Preferred stock, shares authorized	500,000	500,000
Preferred stock, shares issued	0	0
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	146,279,384	146,015,082
Common stock, shares outstanding	146,279,384	146,015,082