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Interest Rate Caps - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016 USD ($)
Derivative [Line Items]
Notional amount of interest rate cap	$ 200,000,000
Strike rate	2.50%
Interest Rate Cap Contracts Expiring in April 2018 [Member]
Derivative [Line Items]
Notional amount of interest rate cap	$ 150,000,000
Maturity period of interest rate caps exchanged	Apr. 01, 2018
Interest Rate Cap Contracts Expiring in March 2019 [Member]
Derivative [Line Items]
Notional amount of interest rate cap	$ 50,000,000
Maturity period of interest rate caps exchanged	Mar. 31, 2019

X

- Definition

Nominal or face amount used to calculate payments on the derivative asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5579245-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Notional Amount
-URI http://asc.fasb.org/extlink&oid=6519104

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5580258-113959

+ Details

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X

- 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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X

- 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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X

- Definition

Date the derivative contract matures, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

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- Details

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- Details

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