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Derivative Financial Instruments - Summary of Aggregate Amount and Estimated Net Fair Value of Derivative Instruments (Detail) - USD ($)	Dec. 31, 2019	May 09, 2019	Dec. 31, 2018	Nov. 30, 2018	Oct. 17, 2018	Nov. 17, 2017	Jun. 24, 2016
Interest Rate Swap
Derivative Instruments Gain Loss [Line Items]
Derivative, notional amount							$ 150,000,000
Cash Flow Hedge
Derivative Instruments Gain Loss [Line Items]
Derivative, notional amount	$ 400,000,000		$ 400,000,000
Fair Value of Assets	953,000
Fair Value of Liabilities	7,769,000
Fair Value of Assets			8,307,000
Cash Flow Hedge | Interest Rate Swap
Derivative Instruments Gain Loss [Line Items]
Derivative, notional amount	150,000,000		150,000,000
Fair Value of Assets	953,000		4,751,000
Cash Flow Hedge | Interest Rate Collar
Derivative Instruments Gain Loss [Line Items]
Derivative, notional amount	250,000,000		250,000,000	$ 150,000,000	$ 100,000,000	$ 100,000,000
Fair Value of Assets			$ 3,556,000
Fair Value of Liabilities	4,330,000
Cash Flow Hedge | Forward Interest Rate Swap
Derivative Instruments Gain Loss [Line Items]
Derivative, notional amount		$ 150,000,000
Fair Value of Liabilities	$ 3,439,000

X

- Definition

Fair value of all asset derivatives designated as cash flow 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 4B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959

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- Definition

Fair value of all liability derivatives designated as cash flow 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 4B
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+ References

No definition available.

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- Definition

Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as an asset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
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-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
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