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Fair Value Measurements - Additional Information (Detail) - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Feb. 28, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fixed-rate debt, outstanding $ 10,600,000    
Change in fair value of interest rate swap, net of tax (3,856,000) $ 0  
Interest Rate Swap      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative, notional amount     $ 700,000,000
Derivative, fixed interest rate     2.4575%
Change in fair value of interest rate swap, net of tax $ (3,900,000)