Finance Assets (Allowance for Credit Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Revenue recognition resume period (less than)	60 days
Allowance for Credit Losses
Balance Beginning	$ 18,633	$ 20,500
Amounts charged to expense	4,682	2,719
Write-offs and other	(3,535)	(3,389)
Balance Closing	$ 19,780	19,830
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	$ 7,721	8,247
Amounts charged to expense	2,217	1,758
Write-offs and other	(1,175)	(1,189)
Balance Closing	8,763	8,816
Sales-type lease receivables | International
Allowance for Credit Losses
Balance Beginning	2,794	2,647
Amounts charged to expense	399	178
Write-offs and other	(110)	(256)
Balance Closing	$ 3,083	2,569
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	$ 7,098	8,517
Amounts charged to expense	1,925	639
Write-offs and other	(2,073)	(1,787)
Balance Closing	6,950	7,369
Loan receivables | International
Allowance for Credit Losses
Balance Beginning	1,020	1,089
Amounts charged to expense	141	144
Write-offs and other	(177)	(157)
Balance Closing	$ 984	$ 1,076