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SHORT-TERM BORROWINGS - Summary of the Use of Short-Term Borrowings (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Debt Disclosure [Abstract] |  |  |
Balance at year-end | $ 55,729 | $ 146,600 | $ 55,000
Weighted average interest rate at year-end | 0.41% | 1.87% | 2.76%
Average balance during the year | $ 138,310 | $ 23,171 | $ 71,457
Average interest rate during the year | 0.67% | 2.20% | 2.09%
Maximum month-end balance during the year | $ 178,729 | $ 146,600 | $ 103,000

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- Definition For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, average borrowings during the period. + References No definition available. + Details
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- Definition For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, maximum month-end borrowings during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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