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Contingent Liabilities and Commitments (Lease commitments for leases having terms of more than one year) (Details)
$ in Thousands
Jun. 30, 2018
USD ($)
Year-ended June 30:  
2019 $ 25,327
2020 18,828
2021 17,238
2022 16,081
2023 15,591
Thereafter 65,970
Total 159,035
Property Plant and Equipment, Ground [Member]  
Year-ended June 30:  
2019 1,008
2020 1,024
2021 1,025
2022 1,030
2023 1,030
Thereafter 49,391
Total 54,508
Property, Plant and Equipment, Operating [Member]  
Year-ended June 30:  
2019 17,032
2020 17,376
2021 16,213
2022 15,051
2023 14,561
Thereafter 16,579
Total 96,812
Rental Equipment [Member]  
Year-ended June 30:  
2019 7,287
2020 428
2021
2022
2023
Thereafter
Total $ 7,715