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Commitments and Contingencies - Future Minimum Rental Payments Required Under Operating Leases (Details)
$ in Thousands
Mar. 31, 2015
USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]  
2015 $ 2,285
2016 2,054
2017 2,003
2018 1,540
2019 1,492
Thereafter 2,599
Total minimum lease payments $ 11,973