RELATED PERSON TRANSACTIONS - Leased Property by Real Estate Ventures (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Maximum \| Real estate ventures in Baltimore, MD \| Lease Services \| President and Chief Executive Officer
Related Party Transaction [Line Items]
Amount received	$ 0.2	$ 0.1	$ 0.4	$ 0.4

Reflects the sum of all other revenue and income realized from sales and other transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration