Derivative Financial Instruments (Details) - USD ($)	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2018
Derivative [Line Items]
Gain or loss from components excluded from assessment of cash flow hedge effectiveness	$ 0	$ 0
Gain or loss recognized related to hedge ineffectiveness	0	0
Estimated amount to be reclassified from Accumulated other comprehensive income (loss) as an increase to interest expense	491,000
Interest Expense
Derivative [Line Items]
Amount of gain recognized on derivative in Other Comprehensive Income	(1,260,000)	459,000
Amount of loss reclassified from Accumulated Other Comprehensive Income into Interest expense	99,000	$ 43,000
Other Assets
Derivative [Line Items]
Fair value of derivative financial instrument asset	3,793,000		$ 2,434,000
Accounts payable and accrued liabilities
Derivative [Line Items]
Fair value of derivative financial instrument liability	0		$ 0
Hedging instrument | Interest Rate Swap, Maturity Date April 1, 2022
Derivative [Line Items]
Current Notional Amount	$ 1,298,000
Fixed rate (as a percent)	5.25%
Hedging instrument | Interest Rate Swap, Maturity Date May 6, 2023
Derivative [Line Items]
Current Notional Amount	$ 26,061,000
Fixed rate (as a percent)	3.61%
Hedging instrument | Interest Rate Swap, Maturity Date September 19, 2026
Derivative [Line Items]
Current Notional Amount	$ 27,000,000
Fixed rate (as a percent)	4.05%
London Interbank Offered Rate (LIBOR) | Hedging instrument | Interest Rate Swap, Maturity Date January 1, 2021
Derivative [Line Items]
Current Notional Amount	$ 9,200,000
Fixed rate (as a percent)	3.86%
London Interbank Offered Rate (LIBOR) | Hedging instrument | Interest Rate Swap, Maturity Date July 1, 2021
Derivative [Line Items]
Current Notional Amount	$ 29,000,000
Fixed rate (as a percent)	3.00%