Finance Assets (Finance Receivables) (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net investment in finance receivables	$ 1,387,250	$ 1,480,090
North America
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net investment in finance receivables	1,133,473	1,205,476
International
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net investment in finance receivables	253,777	274,614
Sales-type lease receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross finance receivables	1,269,558	1,315,608
Unguaranteed residual values	71,728	88,295
Unearned income	(266,614)	(279,045)
Allowance for credit losses	(13,043)	(10,515)
Net investment in receivables	1,061,629	1,114,343
Sales-type lease receivables \| North America
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross finance receivables	1,000,825	1,023,549
Unguaranteed residual values	58,565	74,093
Unearned income	(210,001)	(216,720)
Allowance for credit losses	(10,779)	(7,721)
Net investment in receivables	838,610	873,201
Sales-type lease receivables \| International
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross finance receivables	268,733	292,059
Unguaranteed residual values	13,163	14,202
Unearned income	(56,613)	(62,325)
Allowance for credit losses	(2,264)	(2,794)
Net investment in receivables	223,019	241,142
Loan receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross finance receivables	333,218	373,865
Allowance for credit losses	(7,597)	(8,118)
Net investment in receivables	325,621	365,747
Loan receivables \| North America
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross finance receivables	301,575	339,373
Allowance for credit losses	(6,712)	(7,098)
Net investment in receivables	294,863	332,275
Loan receivables \| International
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross finance receivables	31,643	34,492
Allowance for credit losses	(885)	(1,020)
Net investment in receivables	$ 30,758	$ 33,472
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lease period	3 years
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Lease period	5 years

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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