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Contingencies - Future Minimum Lease Payments (Details)
$ in Thousands
Dec. 31, 2016
USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]  
2017 $ 5,639
2018 5,335
2019 5,163
2020 4,468
2021 4,318
Thereafter $ 26,269