Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments - Additional Information (Detail)

v3.19.1
Derivative Financial Instruments - Additional Information (Detail)
3 Months Ended
Mar. 31, 2019
USD ($)
Instrument
Mar. 31, 2018
USD ($)
Sep. 30, 2018
USD ($)
Derivative [Line Items]      
Realized (gain) loss on derivatives net of accumulated other comprehensive loss to interest expense $ 229,000 $ 196,000  
Number of interest rate swaps held | Instrument 0    
Interest Expense [Member]      
Derivative [Line Items]      
Realized (gain) loss on derivatives net of accumulated other comprehensive loss to interest expense   $ (30,000)  
Senior Term Note Due July 1, 2026 [Member]      
Derivative [Line Items]      
Settlement of forward starting swap agreements $ 9,200,000    
Amortized period on interest expense 10 years    
Interest Rate Swaps Settled in 2018 [Member]      
Derivative [Line Items]      
Derivative notional amount     $ 100,000,000
Realized (gain) loss on derivatives net of accumulated other comprehensive loss to interest expense $ 0