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Leasing (Tables) | 12 Months Ended
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Dec. 31, 2017
Leases [Abstract] |
Future minimum lease payments for operating leases |
| December 31, 2017
| Related Parties |  | Non-Related Parties |  | Total
2018 | $ | 4,663 |  |  | $ | 288,654 |  |  | $ | 293,317 |
2019 | 3,210 |  |  | 274,694 |  |  | 277,904 |
2020 | 2,389 |  |  | 255,376 |  |  | 257,765 |
2021 | 1,922 |  |  | 227,392 |  |  | 229,314 |
2022 | 1,164 |  |  | 203,028 |  |  | 204,192 |
Thereafter | 4,476 |  |  | 1,100,193 |  |  | 1,104,669 |
Total | $ | 17,824 |  |  | $ | 2,349,337 |  |  | $ | 2,367,161 |
Schedule of net rent expense |
| For the Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Minimum operating lease expense | $ | 289,245 |  |  | $ | 273,559 |  |  | $ | 263,479 |
Contingent rents | 1,049 |  |  | 892 |  |  | 947 |
Other lease related occupancy costs | 12,478 |  |  | 13,241 |  |  | 12,852 |
Total rent expense | 302,772 |  |  | 287,692 |  |  | 277,278 |
Less: sublease income | 4,158 |  |  | 4,439 |  |  | 4,019 |
Net rent expense | $ | 298,614 |  |  | $ | 283,253 |  |  | $ | 273,259 |

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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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- Definition Tabular disclosure of rental expense from operating leases for each period for which an income statement is presented with separate amounts for minimum rentals, contingent rentals, and sublease rentals. Rental payments under leases with terms of a month or less that were not renewed need not be included. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717 + Details
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