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Leases - Narrative (Details) | 6 Months Ended
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Jun. 30, 2019
Leases [Abstract] |
Lessee, Operating Lease, Description | expire at various dates through 2036
Lessee, Operating Lease, Variable Lease Payment, Terms and Conditions | Variable lease payments are generally expensed as incurred and include certain index-based changes in rent, certain nonlease components, such as maintenance and other services provided by the lessor, and other charges included in the lease.

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- References No definition available. + Details
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- Definition Description of lessee's operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseDescription
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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Period Type: | duration

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- Definition Description of basis, terms, and conditions on which variable lease payment for lessee's operating lease is determined. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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