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Leases | 12 Months Ended
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Dec. 31, 2023
Leases [Abstract] |
Leases | Leases The Company has long-term, non-cancelable operating leases for campuses and other administrative facilities. These leases generally range from 3 years to 15 years and may include renewal options to extend the lease term. In addition, the leases commonly include lease incentives in the form of rent abatements and tenant improvement allowances. The Company subleases certain portions of unused building space to third parties. The components of lease costs were as follows for the years ended December 31, 2021, 2022, and 2023 (in thousands)
| 2021 |  | 2022 |  | 2023
Lease Cost: |  |  |  |  |
Operating lease cost(1) | $ | 53,957 |  |  | $ | 28,404 |  |  | $ | 29,897 |
Short-term lease cost | 1,768 |  |  | 641 |  |  | 360 |
Sublease income | (2,255) |  |  | (1,135) |  |  | (906) |
Total lease costs | $ | 53,470 |  |  | $ | 27,910 |  |  | $ | 29,351 |
___________________________________________________________ (1)During the years ended December 31, 2021, 2022 and 2023, operating lease cost includes $18.9 million, $1.2 million, and $5.1 million of right-of-use lease asset impairment charges, respectively, related to redundant leased space that was vacated during the year. The following table provides a summary of the Company’s average lease term and discount rate as of December 31, 2022 and 2023:
| As of December 31, 2022 |  | As of December 31, 2023
Weighted average remaining lease term (years) | 7.2 |  | 6.6
Weighted average discount rate | 4.05 | % |  | 4.27 | %
Supplemental information related to the Company’s leases for the years ended December 31, 2021, 2022, and 2023 (in thousands):
| Year ended December 31, 2021 |  | Year ended December 31, 2022 |  | Year ended December 31, 2023
Cash paid for amounts included in the measurement of lease liabilities | $ | 43,021 |  |  | $ | 35,138 |  |  | $ | 30,742 |
Right-of-use assets obtained in exchange for operating lease liabilities | $ | 79,953 |  |  | $ | 4,674 |  |  | $ | 17,921 |
Maturities of lease liabilities (in thousands):
Year Ending December 31, |
2024 | $ | 30,151 |
2025 | 29,171 |
2026 | 26,796 |
2027 | 23,963 |
2028 | 21,129 |
Thereafter | 44,738 |
Total lease payments | 175,948 |
Less: interest | (24,023) |
Present value of lease liabilities | $ | 151,925 |

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- Definition The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//842-20/tableOfContent + Details
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