Lessor Leases - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Lessor, Lease, Description [Line Items]
Allowance for credit losses on sales-type leases	$ 200
Allowance for credit losses on sales-type leases		$ 200
Property and equipment, net	54,246	51,500
Accumulated depreciation	115,715	100,789
Depreciation expense	17,200	15,100	$ 16,200
Leased Equipment under Operating Leases
Lessor, Lease, Description [Line Items]
Property and equipment, net	2,100	2,600
Accumulated depreciation	1,600	1,200
Depreciation expense	$ 700	$ 500	$ 300
Minimum
Lessor, Lease, Description [Line Items]
Term of sales-type leases	1 year
Term of operating leases	1 year
Maximum
Lessor, Lease, Description [Line Items]
Term of sales-type leases	5 years
Term of operating leases	7 years