Business, Basis of Presentation and Summary of Significant Accounting Policies - Derivative Instruments (Details) $ in Millions	Apr. 30, 2018 USD ($)
Interest rate cap
Derivative [Line Items]
Strike rate (as a percent)	2.00%
Capped interest rate (as a percent)	5.75%
Forward currency forward
Derivative [Line Items]
Notional amount	$ 569.2
Designated \| Interest rate cap
Derivative [Line Items]
Notional amount	$ 275.0

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

+ Details

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- Definition

Cap rate on an interest rate derivative such as an interest rate cap or collar. If market rates exceed the cap rate, a payment or receipt is triggered on the contract.

+ References

No definition available.

+ Details

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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

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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.

+ Details

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- Details

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- Details

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- Details

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