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Commitments and Contingencies (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract] |  |  |
Rental expense | $ 6,900 | $ 6,400 | $ 5,900
Minimum rental commitments |  |  |
2019 | 6,962 |  |
2020 | 5,830 |  |
2021 | 4,481 |  |
2022 | 3,457 |  |
2023 | 2,399 |  |
Thereafter | 8,563 |  |
Minimum rental commitments under all non-cancelable leases | 31,692 |  |
Future minimum commitments |  |  |
Contractual Obligation, Due in 2019 | 30,832 |  |
Contractual Obligation, Due in 2020 | 3,977 |  |
Contractual Obligation, Due in 2021 | 2,241 |  |
Contractual Obligation, Due in 2022 | 583 |  |
Contractual Obligation, Due in 2023 | 0 |  |
Thereafter | 0 |  |
Total commitments | 37,633 |  |
Debt Interest Obligations |  |  |
Future minimum commitments |  |  |
Contractual Obligation, Due in 2019 | 1,234 |  |
Contractual Obligation, Due in 2020 | 450 |  |
Contractual Obligation, Due in 2021 | 250 |  |
Contractual Obligation, Due in 2022 | 0 |  |
Contractual Obligation, Due in 2023 | 0 |  |
Thereafter | 0 |  |
Total commitments | 1,934 |  |
Capital Lease Obligations |  |  |
Future minimum commitments |  |  |
Contractual Obligation, Due in 2019 | 1,160 |  |
Contractual Obligation, Due in 2020 | 1,160 |  |
Contractual Obligation, Due in 2021 | 484 |  |
Contractual Obligation, Due in 2022 | 0 |  |
Contractual Obligation, Due in 2023 | 0 |  |
Thereafter | 0 |  |
Total commitments | 2,804 |  |
Purchase Obligations |  |  |
Future minimum commitments |  |  |
Contractual Obligation, Due in 2019 | 28,438 |  |
Contractual Obligation, Due in 2020 | 2,367 |  |
Contractual Obligation, Due in 2021 | 1,507 |  |
Contractual Obligation, Due in 2022 | 583 |  |
Contractual Obligation, Due in 2023 | 0 |  |
Thereafter | 0 |  |
Total commitments | $ 32,895 |  |

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