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Goodwill and Other Intangible Assets - Schedule of Expected Amortization of Intangible Asset (Detail)
$ in Thousands
Dec. 31, 2018
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2019 $ 534
2020 534
2021 534
2022 534
2023 534
Thereafter 1,153
Total $ 3,823