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Derivative Financial Instruments - Summary of Derivative Instruments Designated as Hedging Instruments (Details) - USD ($)
Jun. 30, 2019
Apr. 01, 2019
Dec. 31, 2018
Sep. 01, 2015
Dec. 01, 2014
Derivative [Line Items]          
Fair Value $ 5,000   $ 26,000    
Notional amount $ 100,000,000   150,000,000    
Interest rate cap          
Derivative [Line Items]          
Derivative cap interest rate 4.00%        
Interest rate cap, Maturity 5/4/2021          
Derivative [Line Items]          
Derivative cap interest rate 4.00%        
Fair Value $ 5,000   25,000    
Notional amount $ 50,000,000   50,000,000   $ 50,000,000.0
Interest rate cap, Maturity 4/1/2019          
Derivative [Line Items]          
Derivative cap interest rate 4.00%        
Fair Value $ 0   0    
Notional amount $ 0 $ 50,000,000.0 50,000,000    
Interest rate cap, Maturity 2/3/2020          
Derivative [Line Items]          
Derivative cap interest rate 4.00%        
Fair Value $ 0   1,000    
Notional amount $ 50,000,000   $ 50,000,000 $ 50,000,000.0