Fair Value Disclosures - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - Recurring Basis $ in Thousands	Mar. 31, 2019 USD ($)
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets - cash flow hedge swap agreements	$ 0
Other liabilities - cash flow hedge swap agreements	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets - cash flow hedge swap agreements	25,908
Other liabilities - cash flow hedge swap agreements	9,307
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other assets - cash flow hedge swap agreements	0
Other liabilities - cash flow hedge swap agreements	$ 0