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Lessor Leases Operating Lease Income (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Operating Leased Assets [Line Items] |  |  |
Rental income | $ 3,287 | $ 2,790 |
Total property and equipment, net | 52,039 |  | $ 51,500
Accumulated depreciation and amortization | 103,228 |  | 100,789
Depreciation | $ 4,000 | 3,500 |
Minimum |  |  |
Operating Leased Assets [Line Items] |  |  |
Term of Contract ( in years ) | 1 year |  |
Maximum |  |  |
Operating Leased Assets [Line Items] |  |  |
Term of Contract ( in years ) | 7 years |  |
Equipment |  |  |
Operating Leased Assets [Line Items] |  |  |
Depreciation |  | $ 100 |
Equipment |  |  |
Operating Leased Assets [Line Items] |  |  |
Total property and equipment, net | $ 2,500 |  | 2,600
Accumulated depreciation and amortization | 1,300 |  | $ 1,200
Depreciation | $ 100 |  |

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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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- Definition Term of lessor's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=77888428&loc=SL77919359-209981 + Details
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- Definition The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e39896-112707 + Details
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