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Debt - Maturities of Long-term Debt (Detail)
$ in Thousands
Dec. 31, 2018
USD ($)
Maturities Of Long Term Debt [Line Items]  
2019 $ 24,513
2020 26,825
2021 34,532
2022 34,683
2023 164,080
Total 284,633
New Term Loan Facility [Member]  
Maturities Of Long Term Debt [Line Items]  
2019 11,750
2020 14,688
2021 23,500
2022 24,969
2023 157,156
Total $ 232,063