Finance Assets and Lessor Operating Leases (Credit Quality) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Low
Financing Receivable, Credit Quality Indicator [Line Items]
Approximate percentage of portfolio	30.00%
Medium
Financing Receivable, Credit Quality Indicator [Line Items]
Approximate percentage of portfolio	40.00%
High
Financing Receivable, Credit Quality Indicator [Line Items]
Approximate percentage of portfolio	30.00%
Sales-type lease receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Gross finance receivables	$ 1,278,208	$ 1,352,932
Sales-type lease receivables | North America
Financing Receivable, Credit Quality Indicator [Line Items]
Gross finance receivables	1,081,063	1,110,896
Sales-type lease receivables | North America | Low
Financing Receivable, Credit Quality Indicator [Line Items]
Gross finance receivables	893,068	922,414
Sales-type lease receivables | North America | Medium
Financing Receivable, Credit Quality Indicator [Line Items]
Gross finance receivables	131,312	131,650
Sales-type lease receivables | North America | High
Financing Receivable, Credit Quality Indicator [Line Items]
Gross finance receivables	20,930	22,110
Sales-type lease receivables | North America | Not Scored
Financing Receivable, Credit Quality Indicator [Line Items]
Gross finance receivables	35,753	34,722
Loan receivables
Financing Receivable, Credit Quality Indicator [Line Items]
Gross finance receivables	319,820	329,589
Loan receivables | North America
Financing Receivable, Credit Quality Indicator [Line Items]
Gross finance receivables	289,694	300,319
Loan receivables | North America | Low
Financing Receivable, Credit Quality Indicator [Line Items]
Gross finance receivables	229,888	238,620
Loan receivables | North America | Medium
Financing Receivable, Credit Quality Indicator [Line Items]
Gross finance receivables	42,731	43,952
Loan receivables | North America | High
Financing Receivable, Credit Quality Indicator [Line Items]
Gross finance receivables	5,703	5,947
Loan receivables | North America | Not Scored
Financing Receivable, Credit Quality Indicator [Line Items]
Gross finance receivables	$ 11,372	$ 11,800