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Contingent Liabilities and Commitments (Lease commitments for leases having terms of more than one year) (Details)
$ in Thousands
Dec. 31, 2016
USD ($)
Year-ended September 30:  
2017 $ 27,660
2018 24,560
2019 18,162
2020 15,543
2021 15,315
Thereafter 41,320
Total 142,560
Property, Plant and Equipment [Member]  
Year-ended September 30:  
2017 16,445
2018 14,592
2019 15,063
2020 15,543
2021 15,315
Thereafter 41,320
Total 118,278
Rental Equipment [Member]  
Year-ended September 30:  
2017 11,215
2018 9,968
2019 3,099
2020
2021
Thereafter
Total $ 24,282