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Revenue - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Monthly resident fees	$ 21.1	$ 38.9
Revenue recognized	60.6	94.6	$ 82.1
Accelerated and Advance Payment Program | CARES Act
Disaggregation of Revenue [Line Items]
Amount received from Accelerated and Advance Payment Program	87.5
Deferred Revenue and Credits
Disaggregation of Revenue [Line Items]
Deferred revenue	$ 138.3	$ 72.5

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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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