Land Leases (Details)
Sep. 30, 2018
|Moline Facility [Member]|
|Lessee, Operating Lease, Renewal Term||10 years|
|Silvis facility [Member]|
|Lessee, Operating Lease, Renewal Term||67 years|
Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.
Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef