Finance Assets (Credit Quality) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
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	$ 1,307,305	$ 1,361,315
Sales-type lease receivables | North America
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	1,023,206	1,088,053
Sales-type lease receivables | North America | Low
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	817,332	879,823
Sales-type lease receivables | North America | Medium
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	136,995	135,953
Sales-type lease receivables | North America | High
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	21,528	22,600
Sales-type lease receivables | North America | Not Scored
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	47,351	49,677
Loan receivables
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	374,182	406,863
Loan receivables | North America
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	339,726	374,147
Loan receivables | North America | Low
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	263,537	296,598
Loan receivables | North America | Medium
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	52,630	53,647
Loan receivables | North America | High
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	6,897	7,216
Loan receivables | North America | Not Scored
Financing Receivable, Recorded Investment [Line Items]
Gross finance receivables	$ 16,662	$ 16,686