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Leases | 12 Months Ended
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Dec. 31, 2020
Leases [Abstract] |
Leases | Leases The Company has operating leases for corporate and field offices, and certain equipment. The Company’s leases have remaining lease terms of 1 month to 9 years, some of which include options to extend the leases for up to 10 years, and some of which include options to terminate the leases within 1 year. Operating lease expense was $81.5 million and $77.7 million for the years ended December 31, 2020, and 2019, respectively. Rental expense, primarily for offices premises, was $89.4 million for the year ended December 31, 2018. Supplemental cash flow information related to leases consisted of the following (in thousands):
| Year Ended December 31,
| 2020 |  | 2019
Cash paid for operating lease liabilities | $ | 84,569 |  |  | $ | 78,152 |
Right-of-use assets obtained in exchange for new operating lease liabilities | 37,786 |  |  | 32,170 |
Supplemental balance sheet information related to leases consisted of the following:
| December 31,
| 2020 |  | 2019
Weighted average remaining lease term for operating leases | 4.5 years |  | 4.8 years
Weighted average discount rate for operating leases | 2.6 | % |  | 3.0 | %
Future minimum lease payments under non-cancellable leases as of December 31, 2020, were as follows (in thousands):
2021 | $ | 84,849 |
2022 | 71,119 |
2023 | 59,211 |
2024 | 47,478 |
2025 | 29,173 |
Thereafter | 29,440 |
Less: Imputed interest | (18,797) |
Present value of operating lease liabilities (a) | $ | 302,473 |
(a) Includes current portion of $78.6 million for operating leases. As of December 31, 2020, the Company had no material future minimum lease obligations that had not yet commenced.

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=77888251 + Details
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