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Selected Balance Sheet Data Assets Held for Sale (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Sep. 30, 2018
Assets held for sale $ 0 $ 5,220 [1]
Minnetonka, MN    
Assets held for sale [1]   $ 5,200
[1] Prior period information has been restated for the adoption of ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606)”, which we adopted on October 1, 2018.