Lease Comitments Lease Commitments (Tables)

12 Months Ended

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