Contingent Liabilities and Commitments (Lease Commitments for Leases having Terms of More than One Year) (Details) $ in Thousands	Mar. 31, 2017 USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2018	$ 27,138
2019	23,954
2020	17,186
2021	15,990
2022	15,844
Thereafter	81,261
Total	181,373
Property Plant and Equipment, Ground [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2018	957
2019	991
2020	1,024
2021	1,024
2022	1,030
Thereafter	46,911
Total	51,937
Property, Plant and Equipment, Operating [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2018	15,214
2019	13,923
2020	14,854
2021	14,966
2022	14,814
Thereafter	34,350
Total	108,121
Rental Equipment [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2018	10,967
2019	9,040
2020	1,308
2021
2022
Thereafter
Total	$ 21,315