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Employee Benefit Plans and Stock-based Compensation - Benefit Obligation Payments By Years (Details)
$ in Thousands
Sep. 30, 2016
USD ($)
Postemployment Benefits [Abstract]  
2016 (remaining three months) $ 24
2017 117
2018 227
2019 366
2020 433
2021 - 2025 2,310
Future benefits expected to be paid in next 5 years and five-year period thereafter $ 3,477