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Long Term Debt - Summary of Company's Interest Rate Swap Agreements Designated as Cash Flow Hedges (Detail) - Designated as Hedging Instrument - Cash Flow Hedging $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($)
Debt Instrument [Line Items] |  |
Estimated Fair Value | $ 5,093 | [1]
Interest Rate Swap Agreement 1 |  |
Debt Instrument [Line Items] |  |
Notional Amount | $ 175,000 |
Effective Date | Dec. 31, 2018 |
Pay Rate | 2.751% |
Receive Rate | 1-Month LIBOR |
Expiration Date | Dec. 31, 2022 |
Estimated Fair Value | $ 1,983 | [1]
Interest Rate Swap Agreement 2 |  |
Debt Instrument [Line Items] |  |
Notional Amount | $ 137,500 |
Effective Date | Dec. 31, 2018 |
Pay Rate | 2.765% |
Receive Rate | 1-Month LIBOR |
Expiration Date | Dec. 31, 2022 |
Estimated Fair Value | $ 1,624 | [1]
Interest Rate Swap Agreement 3 |  |
Debt Instrument [Line Items] |  |
Notional Amount | $ 137,500 |
Effective Date | Dec. 31, 2018 |
Pay Rate | 2.746% |
Receive Rate | 1-Month LIBOR |
Expiration Date | Dec. 31, 2022 |
Estimated Fair Value | $ 1,486 | [1]
[1] | Included in other long-term liabilities on the consolidated balance sheet as of December 31, 2018.

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- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611 + Details
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- Definition Date the entity entered into the derivative contract, in CCYY-MM-DD format. + References No definition available. + Details
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- Definition Nominal or face amount used to calculate payments on the derivative liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 + Details
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