Derivative Instruments and Hedging Activities - Additional Information (Detail)	Mar. 31, 2019 USD ($) Swap	Dec. 31, 2018 USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Reclassified as a reduction to interest expense, expected during the next 12 months	$ 500,000
Interest Rate Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap	$ 1,000,000,000
Number of interest rate swaps held | Swap	5
Not Designated as Hedge Accounting Relationships [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivatives outstanding	$ 0	$ 0