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Derivative Financial Instruments - Additional Information (Detail) - USD ($)		3 Months Ended	6 Months Ended
	May 09, 2019	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2018
Derivative Instruments Gain Loss [Line Items]
Realized gains (losses) on interest rate hedges reclassified to earnings		$ 467,000		$ 1,026,000
Cash Flow Hedge
Derivative Instruments Gain Loss [Line Items]
Derivative, notional amount		$ 400,000,000		$ 400,000,000	$ 400,000,000
Derivative, strike rate for the forward interest rate swap contract	2.176%
Cash Flow Hedge | Forward Interest Rate Swap
Derivative Instruments Gain Loss [Line Items]
Derivative, notional amount	$ 150,000,000
Derivative, effective date	Jun. 17, 2021
Derivative, maturity date	Jun. 17, 2026
Cash Flow Hedge | Interest Rate Swap and Collars | Scenario, Forecast
Derivative Instruments Gain Loss [Line Items]
Reclassified out of accumulated other comprehensive income to earnings, amount			$ 86,000

X

- Definition

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

+ References

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

Derivative effective date.

+ References

No definition available.

+ Details

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- Definition

Interest rate cash flow hedge gain loss reclassified to earnings net of mark to market.

+ References

No definition available.

+ Details

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- Definition

Stated rate on an interest rate forward or futures contract.

+ 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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- Definition

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4D
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959

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- Definition

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

+ References

No definition available.

+ Details

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