Finance Assets and Lessor Operating Leases (Credit Quality) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Low
Financing Receivable, Recorded Investment [Line Items]
Approximate percentage of portfolio	30.00%
Medium
Financing Receivable, Recorded Investment [Line Items]
Approximate percentage of portfolio	40.00%
High
Financing Receivable, Recorded Investment [Line Items]
Approximate percentage of portfolio	30.00%
Sales-type lease receivables
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	$ 1,290,088	$ 1,358,670
Sales-type lease receivables | North America
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	1,099,620	1,110,896
Sales-type lease receivables | North America | Low
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	909,353	922,414
Sales-type lease receivables | North America | Medium
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	131,425	131,650
Sales-type lease receivables | North America | High
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	23,478	22,110
Sales-type lease receivables | North America | Not Scored
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	35,364	34,722
Loan receivables
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	316,294	329,589
Loan receivables | North America
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	286,716	300,319
Loan receivables | North America | Low
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	224,517	238,620
Loan receivables | North America | Medium
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	45,167	43,952
Loan receivables | North America | High
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	5,429	5,947
Loan receivables | North America | Not Scored
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	$ 11,603	$ 11,800