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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
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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 |  |  |  |  |  |

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- 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 + Details
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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 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 + 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 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 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 + Details
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