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RESTRUCTURING AND FACILITIES CONSOLIDATION INITIATIVES (Tables) | 3 Months Ended
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Mar. 31, 2020
Restructuring and Related Activities [Abstract] |
Summary of restructuring accrual activity | The components of Restructuring and related expense for the three months ended March 31, 2020 and 2019 were as follows (in thousands):
| Three months ended
| March 31, 2020 |  | March 31, 2019
Severance and related costs | $ | 1,771 |  |  | $ | 4,919 |
Variable and other facilities-related costs | 234 |  |  | 13 |
Accelerated amortization of lease assets due to cease-use | 70 |  |  | — |
| $ | 2,075 |  |  | $ | 4,932 |
A summary of the 2019 Restructuring Initiative accrual activity for severance and related costs for the three months ended March 31, 2020 is as follows (in thousands):
| Balance at January 1, 2020 |  | Initiatives charged to expense |  | Reclassify accelerated amortization to operating lease liabilities |  | Cash payments |  | Balance at March 31, 2020
Severance | $ | 2,110 |  |  | $ | 655 |  |  | $ | — |  |  | $ | (1,253 | ) |  | $ | 1,512 |
Facilities | 991 |  |  | 304 |  |  | (70 | ) |  | (272 | ) |  | 953 |
| $ | 3,101 |  |  | $ | 959 |  |  | $ | (70 | ) |  | $ | (1,525 | ) |  | $ | 2,465 |
A summary of the GENBAND Merger Restructuring Initiative accrual activity for the three months ended March 31, 2020 is as follows (in thousands):
| Balance at January 1, 2020 |  | Cash payments |  | Balance at March 31, 2020
Severance | $ | 409 |  |  | $ | (351 | ) |  | $ | 58 |

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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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