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Debt - Lease Financing Obligations and Debt Committment Letter (Details) | 12 Months Ended
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Dec. 31, 2017 USD ($) Lease_Renewal_Option extension property | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Debt Instrument [Line Items] |  |  |
Interest expense under leases | $ 17,000,000 | $ 17,000,000 | $ 17,000,000
Debt Commitment Letter | Letter of Credit |  |  |
Debt Instrument [Line Items] |  |  |
Maximum borrowing capacity | $ 400,000,000 |  |
Molina Center And Ohio Exchange |  |  |
Debt Instrument [Line Items] |  |  |
Annual increase in rental payment | 3.00% |  |
Number of extensions available (in extension) | extension | 6 |  |
Lease renewal terms | 5 years |  |
Property Subject to Operating Lease | 6th & Pine Development, LLC |  |  |
Debt Instrument [Line Items] |  |  |
Number of properties | property | 2 |  |
Annual increase in rental payment | 3.40% |  |
Operating lease renewal options | Lease_Renewal_Option | 2 |  |
Number of renewal term | 5 years |  |

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- Definition The amount, during the lease term, of each minimum [capital] lease payment allocated to interest expense so as to produce a constant periodic rate of interest on the remaining balance of the capital lease obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 35 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77915053&loc=d3e43161-112731 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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