Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Future Minimum Lease Commitments (Details)

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Commitments and Contingencies - Future Minimum Lease Commitments (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Estimated future minimum rent payments [Abstract]  
2019 $ 4,381
2020 3,923
2021 3,156
2022 2,611
2023 854
Total minimum lease payments 14,925
Estimated future minimum sublease income [Abstract]  
2019 2,249 [1]
2020 2,376 [1]
2021 2,006 [1]
2022 1,746 [1]
2023 592 [1]
Total minimum lease payments $ 8,969 [1]
[1] Sublease income includes base lease payments and expected reimbursement of certain operating expenses under executed sublease agreements as of December 31, 2018