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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract] |
Schedule Of Future Minimum Payments For All Operating Lease Obligations | For years subsequent to December 31, 2017, future minimum payments for all operating lease obligations that have initial non-cancelable lease terms exceeding one year, net of rental income from subleases are as follows.
| Operating Leases |  | Sublease Rental Income
2018 | $ | 44,193 |  |  | $ | 2,000 |
2019 | 41,386 |  |  | 2,164 |
2020 | 38,877 |  |  | 1,604 |
2021 | 36,942 |  |  | 1,556 |
2022 | 21,355 |  |  | 781 |
Thereafter | 85,237 |  |  | 1,774 |
Total | $ | 267,990 |  |  | $ | 9,878 |

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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://www.xbrl.org/2003/role/presentationRef -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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