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Lease Commitments (Tables) | 12 Months Ended
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Dec. 31, 2018
Leases [Abstract] |
Schedule of Future Minimum Cash Commitments Under Operating Leases | We lease certain of our office facilities and equipment under various operating leases. Future minimum cash commitments under operating leases as of December 31, 2018 were as follows (in thousands):
Year Ending December 31, |  | Gross Operating Lease Commitments |  |  | Sub-Leases |  |  | Net Operating Lease Commitments |
2019 |  | $ | 34,490 |  |  | $ | 234 |  |  | $ | 34,256 |
2020 |  |  | 30,653 |  |  |  | 234 |  |  |  | 30,419 |
2021 |  |  | 26,172 |  |  |  | — |  |  |  | 26,172 |
2022 |  |  | 20,358 |  |  |  | — |  |  |  | 20,358 |
2023 |  |  | 18,981 |  |  |  | — |  |  |  | 18,981 |
Thereafter |  |  | 65,854 |  |  |  | — |  |  |  | 65,854 |
Total |  | $ | 196,508 |  |  | $ | 468 |  |  | $ | 196,040 |

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- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
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