Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

The average percentage points added to the reference rate to compute the variable rate on the group of interest rate derivatives.

+ References

No definition available.

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- Definition

Amount of increase in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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SENIOR NOTES PAYABLE AND OTHER DEBT - Derivatives and Hedging (Details) - USD ($) $ in Millions	1 Months Ended
	Aug. 31, 2018	Feb. 28, 2018	Sep. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Derivative notional amount					$ 200.0
Weighted average swap spread				0.98%
Gain on derivative	$ 6.6	$ 10.0
4.40% Senior Notes due 2029
Derivative [Line Items]
Interest rate	4.40%		4.40%
Gain on derivative	$ 4.4
4.00% Senior Notes due 2028
Derivative [Line Items]
Interest rate		4.00%	4.00%
Forward Starting Swap
Derivative [Line Items]
Derivative notional amount	$ 200.0		$ 300.0	$ 400.0