Finance Assets (Allowance for Credit Losses) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Revenue recognition resume period (less than)	60 days
Allowance for Credit Losses
Balance Beginning	$ 20,500	$ 21,690
Amounts charged to expense	13,032	8,250
Write-offs and other	(15,612)	(11,815)
Balance Closing	$ 17,920	18,125
Sales-type lease receivables
Financing Receivable, Allowance for Credit Losses [Line Items]
Revenue recognition discontinuation period (more than)	120 days
Sales-type lease receivables | North America
Allowance for Credit Losses
Balance Beginning	$ 8,247	6,606
Amounts charged to expense	7,807	2,881
Write-offs and other	(8,951)	(3,433)
Balance Closing	7,103	6,054
Sales-type lease receivables | International
Allowance for Credit Losses
Balance Beginning	2,647	3,542
Amounts charged to expense	895	464
Write-offs and other	(774)	(1,419)
Balance Closing	$ 2,768	2,587
Loan receivables
Financing Receivable, Allowance for Credit Losses [Line Items]
Revenue recognition discontinuation period (more than)	90 days
Loan receivables | North America
Allowance for Credit Losses
Balance Beginning	$ 8,517	10,024
Amounts charged to expense	3,892	4,217
Write-offs and other	(5,449)	(5,953)
Balance Closing	6,960	8,288
Loan receivables | International
Allowance for Credit Losses
Balance Beginning	1,089	1,518
Amounts charged to expense	438	688
Write-offs and other	(438)	(1,010)
Balance Closing	$ 1,089	$ 1,196