Favorable and Unfavorable Acquired Lease Contracts, net - Summary (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Favorable
Acquired fair value of lease contracts	$ 126.3	$ 126.4
Accumulated (amortization) accretion	(72.2)	(65.1)
Acquired Intangible Assets, Net	54.1	61.3
Unfavorable
Acquired fair value of lease contracts	(81.3)	(82.6)
Accumulated (amortization) accretion	49.8	42.4
Total acquired fair value of lease contracts, net	(31.5)	(40.2)
Favorable
Favorable
Acquired fair value of lease contracts	65.2	73.0
Accumulated (amortization) accretion	(41.9)	(43.0)
Acquired Intangible Assets, Net	$ 23.3	$ 30.0

No definition available.

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- Definition

Represents the accumulated accretion associated with the acquisition of an off-market lease when the terms of the lease are unfavorable to the market terms for the lease at the date of acquisition.

+ References

No definition available.

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- Definition

Represents the gross liability associated with the acquisition of an off-market lease when the terms of the lease are unfavorable to the market terms for the lease at the date of acquisition.

+ References

No definition available.

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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- References

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- Definition

This element represents a liability associated with the acquisition of an off-market lease when the terms of the lease are unfavorable to the market terms for the lease at the date of acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.24)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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