Other Assets - Schedule of Notes Receivable Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2020	Jun. 30, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201602Member
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Provision for / (recovery of) expected credit losses			$ 382	$ 3,319
Loan Receivables
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning of period balance	$ (87)	$ 0	0
Provision for / (recovery of) expected credit losses	41		388
Write-offs	0		0
End of period balance	(46)	(87)	(46)
Loan Receivables | Impact of adopting Topic 326
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning of period balance	0	(434)	(434)
End of period balance		0
Hardware Financing Receivables
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning of period balance	(29)	(16)	(16)
Provision for / (recovery of) expected credit losses	(8)		(6)
Write-offs	0		0
End of period balance	(37)	(29)	(37)
Hardware Financing Receivables | Impact of adopting Topic 326
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning of period balance	$ 0	(15)	$ (15)
End of period balance		$ 0