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WARRANTY OBLIGATIONS - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Product Warranty Liability [Line Items] |  |  |  |
Additional warranty expense | $ 17,063 | $ 4,269 | $ 21,975 | $ 11,924
Failure Rate For Battery Storage |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |
Additional warranty expense | 13,300 |  | 13,300 |
Expedited Freight Costs And Replacement Costs |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |
Additional warranty expense |  |  | 4,900 |
Labor Reimbursement Rate |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |
Additional warranty expense | $ 3,800 |  | $ 3,800 |
Timing Related To Cost Reduction Assumptions For Replacement Products |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |
Additional warranty expense |  | 2,900 |  | 2,900
Field Performance Data And Diagnostic Root-Cause Failure Analysis |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |
Additional warranty expense |  | $ 1,400 |  | 7,700
Other Cost Assumption Changes |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |
Additional warranty expense |  |  |  | $ 1,300

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- Definition Amount of increase (decrease) in the standard and extended product warranty accrual from changes in estimates attributable to preexisting product warranties. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(4)) -URI https://asc.fasb.org/extlink&oid=126907703&loc=d3e12565-110249 + Details
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