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Commitments and Contingencies (Operating Leases) (Details)
$ in Thousands
Mar. 31, 2017
USD ($)
Future minimum annual rentals under non-cancelable operating leases  
2018 $ 10,294
2019 8,759
2020 7,036
2021 4,907
2022 4,084
Thereafter 4,283
Total $ 39,363