Derivative Financial Instruments (Schedule Of Cash Flow Hedging Instruments) (Detail) - Cash Flow Hedging - Designated as Hedging Instrument	Sep. 30, 2019 USD ($)
October 2021
Derivative [Line Items]
Notional	$ 25,000,000
Fair Value - Asset (Liability)	(386,000)
November 2021
Derivative [Line Items]
Notional	20,000,000
Fair Value - Asset (Liability)	(334,000)
December 2021
Derivative [Line Items]
Notional	165,000,000
Fair Value - Asset (Liability)	(2,841,000)
May 2022
Derivative [Line Items]
Notional	370,000,000
Fair Value - Asset (Liability)	(6,628,000)
June 2022
Derivative [Line Items]
Notional	160,000,000
Fair Value - Asset (Liability)	(2,796,000)
July 2022
Derivative [Line Items]
Notional	230,000,000
Fair Value - Asset (Liability)	(4,027,000)
August 2022
Derivative [Line Items]
Notional	235,000,000
Fair Value - Asset (Liability)	(4,196,000)
September 2023
Derivative [Line Items]
Notional	128,571,000
Fair Value - Asset (Liability)	(4,687,000)
Total Cash Flow Hedges
Derivative [Line Items]
Notional	1,333,571,000
Fair Value - Asset (Liability)	$ (25,895,000)