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v3.20.4

Borrowings - Other short-term borrowings - (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Short-term debt |  |
Maximum aggregate balance outstanding at any month-end | $ 100,000 | $ 160,000
Average monthly aggregate balance outstanding | $ 21,557 | $ 8,703
Weighted average interest rate for the year | 0.56% | 2.50%
Weighted average interest rate at December 31 | 0.73% | 1.85%

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- Definition Weighted average interest rate of short-term debt outstanding calculated at point in time. + 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(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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