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Borrowings (Annual Maturities of Notes, Loans and Leases Payable) (Details)
$ in Thousands
Sep. 30, 2017
USD ($)
Long-term debt, by Maturity:  
2018 $ 451,564
2019 490,060
2020 404,931
2021 497,718
2022 273,441
Thereafter $ 1,330,234