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Long-Term Debt - Consolidated Debt Obligations (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Line Of Credit Facility [Line Items]    
Long-term debt $ 290,000 $ 285,000
Credit Facility [Member]    
Line Of Credit Facility [Line Items]    
Aggregate principal outstanding $ 290,000 $ 285,000