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Lease Comitments Lease Commitments (Tables) | 12 Months Ended
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Dec. 31, 2017
Lease Commitments [Abstract] |
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] | Aggregate minimum rental commitments under all non-cancelable operating leases, exclusive of real estate taxes, insurance, and leases related to facilities closed as a result of the integration of acquired businesses and the restructuring of the company, are as follows:
2018 |  | $ | 75,058 |
2019 |  | 64,397 |
2020 |  | 49,616 |
2021 |  | 37,157 |
2022 |  | 27,964 |
Thereafter |  | 135,079 |

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- Definition Lease Commitments [Abstract] + References No definition available. + Details
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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=6453985&loc=d3e41502-112717 + Details
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