Finance Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Finance Leases And Loans Receivables [Line Items]
Document Period End Date	Mar. 31, 2013
Sales-type Lease Receivables
Gross finance receivables	$ 1,962,896	$ 2,043,221
Unguaranteed residual values	159,949	169,689
Unearned income	(406,192)	(420,288)
Allowance for credit losses	(23,339)	(25,641)
Net investment in sales-type lease receivables	1,693,314	1,766,981
Loan Receivables
Loan receivable	437,454	462,253
Allowance for credit losses	(13,641)	(14,453)
Loans Receivable, Net	423,813	447,800
Allowance for Loan and Lease Losses [Roll Forward]
Balance Beginning	40,094
Amounts charged to expense	3,959
Accounts written off	(7,073)
Balance Closing	36,980
Financing Receivable, Recorded Investment, Aging [Abstract]
Less than 31 days past due	2,263,123	2,371,009
Greater than 30 days and Less than 61 days	60,683	61,376
Greater than 60 days and Less than 91 days	38,505	34,119
Greater than 90 days and Less than 121 days	11,910	12,490
Greater than 120 days	26,129	26,480
Notes, Loans and Financing Receivable, Gross	2,400,350	2,505,474
Still accruing interest	9,878	9,992
Not accruing interest	28,161	28,978
TOTAL	38,039	38,970
Loans and Leases Receivable, Net Reported Amount	2,117,127	2,214,781
Risk Level, Low [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Approximate percentage of portfolio	30.00%
Risk Level, Medium [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Approximate percentage of portfolio	40.00%
Risk Level, High [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Approximate percentage of portfolio	30.00%
North America [Member]
Sales-type Lease Receivables
Net investment in sales-type lease receivables	1,343,813	1,397,366
Loan Receivables
Loans Receivable, Net	381,454	402,638
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans and Leases Receivable, Net Reported Amount	1,725,267	1,800,004
International [Member]
Sales-type Lease Receivables
Net investment in sales-type lease receivables	349,501	369,615
Loan Receivables
Loans Receivable, Net	42,359	45,162
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans and Leases Receivable, Net Reported Amount	391,860	414,777
Sales-type Lease Receivables [Member]
Sales-type Lease Receivables
Gross finance receivables	1,527,074	1,581,711
Sales-type Lease Receivables [Member] | Risk Level, Low [Member]
Sales-type Lease Receivables
Gross finance receivables	1,030,809	1,016,413
Sales-type Lease Receivables [Member] | Risk Level, Medium [Member]
Sales-type Lease Receivables
Gross finance receivables	397,721	450,432
Sales-type Lease Receivables [Member] | Risk Level, High [Member]
Sales-type Lease Receivables
Gross finance receivables	45,669	43,658
Sales-type Lease Receivables [Member] | Not Scored [Member]
Sales-type Lease Receivables
Gross finance receivables	52,875	71,208
Sales-type Lease Receivables [Member] | North America [Member]
Sales-type Lease Receivables
Gross finance receivables	1,527,074	1,581,711
Unguaranteed residual values	139,759	148,664
Unearned income	(307,448)	(316,030)
Allowance for credit losses	(15,572)	(16,979)
Allowance for Loan and Lease Losses [Roll Forward]
Balance Beginning	16,979
Amounts charged to expense	1,067
Accounts written off	(2,474)
Balance Closing	15,572
Financing Receivable, Recorded Investment, Aging [Abstract]
Less than 31 days past due	1,445,912	1,497,797
Greater than 30 days and Less than 61 days	36,003	37,348
Greater than 60 days and Less than 91 days	22,693	24,059
Greater than 90 days and Less than 121 days	6,143	6,665
Greater than 120 days	16,323	15,842
Still accruing interest	6,143	6,665
Not accruing interest	16,323	15,842
TOTAL	22,466	22,507
Sales-type Lease Receivables [Member] | International [Member]
Sales-type Lease Receivables
Gross finance receivables	435,822	461,510
Unguaranteed residual values	20,190	21,025
Unearned income	(98,744)	(104,258)
Allowance for credit losses	(7,767)	(8,662)
Allowance for Loan and Lease Losses [Roll Forward]
Balance Beginning	8,662
Amounts charged to expense	360
Accounts written off	(1,255)
Balance Closing	7,767
Financing Receivable, Recorded Investment, Aging [Abstract]
Less than 31 days past due	399,412	435,780
Greater than 30 days and Less than 61 days	13,952	9,994
Greater than 60 days and Less than 91 days	11,824	5,198
Greater than 90 days and Less than 121 days	3,735	3,327
Greater than 120 days	6,899	7,211
Still accruing interest	3,735	3,327
Not accruing interest	6,899	7,211
TOTAL	10,634	10,538
Loan Receivables [Member]
Loan Receivables
Loan receivable	393,283	414,960
Loan Receivables [Member] | Risk Level, Low [Member]
Loan Receivables
Loan receivable	248,494	254,567
Loan Receivables [Member] | Risk Level, Medium [Member]
Loan Receivables
Loan receivable	127,599	136,069
Loan Receivables [Member] | Risk Level, High [Member]
Loan Receivables
Loan receivable	13,786	14,624
Loan Receivables [Member] | Not Scored [Member]
Loan Receivables
Loan receivable	3,404	9,700
Loan Receivables [Member] | North America [Member]
Loan Receivables
Loan receivable	393,283	414,960
Allowance for credit losses	(11,829)	(12,322)
Allowance for Loan and Lease Losses [Roll Forward]
Balance Beginning	12,322
Amounts charged to expense	2,462
Accounts written off	(2,955)
Balance Closing	11,829
Financing Receivable, Recorded Investment, Aging [Abstract]
Less than 31 days past due	375,470	392,108
Greater than 30 days and Less than 61 days	9,602	12,666
Greater than 60 days and Less than 91 days	3,647	4,577
Greater than 90 days and Less than 121 days	1,845	2,319
Greater than 120 days	2,719	3,290
Still accruing interest	0	0
Not accruing interest	4,564	5,609
TOTAL	4,564	5,609
Loan Receivables [Member] | International [Member]
Loan Receivables
Loan receivable	44,171	47,293
Allowance for credit losses	(1,812)	(2,131)
Allowance for Loan and Lease Losses [Roll Forward]
Balance Beginning	2,131
Amounts charged to expense	70
Accounts written off	(389)
Balance Closing	1,812
Financing Receivable, Recorded Investment, Aging [Abstract]
Less than 31 days past due	42,329	45,324
Greater than 30 days and Less than 61 days	1,126	1,368
Greater than 60 days and Less than 91 days	341	285
Greater than 90 days and Less than 121 days	187	179
Greater than 120 days	188	137
Still accruing interest	0	0
Not accruing interest	375	316
TOTAL	$ 375	$ 316