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Debt and Financing Arrangements - Summary of Recognized Interest Expense (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Debt Instrument [Line Items] |  |  |  |
Total interest expense | $ 974 | $ 1,521 | $ 4,167 | $ 4,509
2018 Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total interest expense | 955 | 1,498 | 4,112 | 4,444
Other [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total interest expense | $ 19 | $ 23 | 54 | $ 65
Other Line of Credit [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total interest expense |  |  | $ 1 |

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- Definition Amount of the cost of borrowed funds accounted for as interest expense for debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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