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LEASES (Tables) | 12 Months Ended
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Dec. 31, 2022
Leases [Abstract] |
Schedule of Lease Expense | Expense
(in thousands) | 2022 |  | 2021 |  | 2020
Fixed lease costs (1) | $ | 20,186 |  |  | $ | (1,694) |  |  | $ | 20,235 |
Short-term lease costs | 3,356 |  |  | 2,244 |  |  | 1,669 |
Variable lease costs | 3,894 |  |  | 4,480 |  |  | 4,470 |
| $ | 27,436 |  |  | $ | 5,030 |  |  | $ | 26,374 |
(1) The lower fixed lease costs in 2021 was due to the modification of the corporate headquarters lease.
Schedule of Right of Use Asset and Lease Liabilities | Right of use assets and lease liabilities
(in thousands) | December 31, 2022 |  | December 31, 2021
Right of use assets (1) | $ | 76,114 |  |  | $ | 87,521 |
Operating lease liabilities (2) | $ | 14,976 |  |  | $ | 6,989 |
Long-term operating lease liabilities | $ | 79,152 |  |  | $ | 87,818 |
(1) Represents the Company’s right to use the leased asset during the lease term. Included in other long-term assets. (2) Included in other current liabilities.
Schedule of Weighted Average and Discount Rate | The weighted-average remaining lease term and discount rate for the Company’s leases were:
| December 31, 2022 |  | December 31, 2021
Weighted-average remaining lease term | 7.5 years |  | 7.7 years
Weighted-average discount rate (1) | 4.1 | % |  | 4.4 | %
(1) The rates implicit in most of the Company’s leases are not readily determinable. Therefore, the Company uses its incremental borrowing rate as the discount rate when measuring operating lease liabilities. The incremental borrowing rate represents an estimate of the interest rate the Company would incur to borrow an amount equal to the lease payments on a collateralized basis over the lease term in a similar economic environment.
Schedule of Lease Maturities after Adoption of 842 | Maturities of lease liabilities:
(in thousands) | December 31, 2022
2023 | $ | 18,476 |
2024 | 17,101 |
2025 | 14,444 |
2026 | 10,860 |
2027 | 9,814 |
Thereafter | 39,265 |
Total lease payments | 109,960 |
Less: imputed interest (1) | (15,832) |
| $ | 94,128 |
(1) Lease liabilities are measured at the present value of the remaining lease payments using a discount rate determined at lease commencement unless the discount rate is updated due to a lease reassessment event.
Schedule of Supplemental Cash Flow Lease Information | Cash flow information (1) (2)
(in thousands) | 2022 |  | 2021
Cash paid for operating leases, net of tenant improvement allowances | $ | 7,690 |  |  | $ | 18,428 |
Right of use assets recognized for new leases and amendments (non-cash) | $ | 4,733 |  |  | $ | 55,068 |
(1) In 2022 and 2021, the Company received tenant improvement allowances of $8.8 million and $3.0 million, respectively, as part of the lease of the Company’s new corporate headquarters in Waltham, Massachusetts. (2) In 2021, the Company received $18 million as a one-time payment for the Company’s accelerated exit from its then corporate headquarters in Cambridge, Massachusetts. This payment has been excluded from the above table.

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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 + Details
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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
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