Finance Assets and Lessor Operating Leases (Allowance for Credit Losses) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Financing Receivable, Allowance for Credit Loss [Line Items]
Revenue recognition resume period (less than)	60 days
Allowance for Credit Losses
Balance Beginning	$ 20,222	$ 18,633
Amounts charged to expense	6,759	10,247
Write-offs and other	(6,264)	(7,536)
Balance Closing	$ 20,717	21,344
Sales-type lease receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Revenue recognition discontinuation period (more than)	120 days
Sales-type lease receivables | North America
Allowance for Credit Losses
Balance Beginning	$ 10,252	7,721
Amounts charged to expense	3,660	5,946
Write-offs and other	(2,590)	(2,538)
Balance Closing	11,322	11,129
Sales-type lease receivables | International
Allowance for Credit Losses
Balance Beginning	2,356	2,794
Amounts charged to expense	455	545
Write-offs and other	(549)	(933)
Balance Closing	$ 2,262	2,406
Loan receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Revenue recognition discontinuation period (more than)	90 days
Loan receivables | North America
Allowance for Credit Losses
Balance Beginning	$ 6,777	7,098
Amounts charged to expense	2,329	3,506
Write-offs and other	(2,732)	(3,735)
Balance Closing	6,374	6,869
Loan receivables | International
Allowance for Credit Losses
Balance Beginning	837	1,020
Amounts charged to expense	315	250
Write-offs and other	(393)	(330)
Balance Closing	$ 759	$ 940