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Selected Balance Sheet Accounts (Details 2)
$ in Thousands
Sep. 30, 2017
USD ($)
Amortization expense for the remainder of the year and for the next five years  
2017 $ 1,313
2018 5,114
2019 3,741
2020 2,310
2021 2,201
2022 1,604
Thereafter 1,807
Total $ 18,090