Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services.

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The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

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- Definition

Amount of lessee's right to use underlying asset under finance lease.

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-Publisher FASB
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Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Term of lessor's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Term of lessor's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Finance Leased Assets, Number Of Units

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Lease Obligations - Narrative (Details) $ in Millions	Jun. 30, 2019 USD ($) center	Jan. 01, 2019 center	Dec. 31, 2018 USD ($)
Operating Leased Assets [Line Items]
Finance lease assets, number of units, centers \| center	2	2
Finance lease, right-of-use asset	$ 9.0
Capital lease assets			$ 15.7
Capital lease, accumulated depreciation			$ 14.1
Minimum [Member]
Operating Leased Assets [Line Items]
Lessee, operating lease, renewal term	5 years
Maximum [Member]
Operating Leased Assets [Line Items]
Lessee, operating lease, renewal term	20 years
Lease term	10 years
Lease renewal term	5 years