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Tower Sale and Leaseback (Future Minimum Payments) (Details)
$ in Thousands
Sep. 30, 2016
USD ($)
Tower Sale and Leaseback [Abstract]  
2016 $ 1,735
2017 6,996
2018 7,136
2019 7,279
2020 7,425
2021 and thereafter 157,690
Total minimum payments 188,261
Less amount representing interest 98,118
Tower obligation $ 90,143