Derivatives (Terminated Derivatives) (Details) - Forward Swap $ in Thousands |
Sep. 30, 2021
USD ($)
Instrument
|
Mar. 31, 2020
USD ($)
Instrument
|
Sep. 30, 2018
USD ($)
Instrument
|
Sep. 30, 2017
USD ($)
Instrument
|
Dec. 31, 2016
USD ($)
Instrument
|
Oct. 31, 2015
USD ($)
Instrument
|
May 30, 2014
USD ($)
Instrument
|
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|---|---|---|---|---|---|---|---|---|---|
| Derivative [Line Items] | |||||||||
| Number Of Interest Rate Derivatives Terminated | Instrument | 2 | 3 | 2 | 2 | 2 | 4 | 3 | ||
| Aggregate Notional Amount | $ 120,000 | $ 200,000 | $ 250,000 | $ 250,000 | $ 180,000 | $ 300,000 | $ 225,000 | ||
| Liability Fair Value When Terminated | 1,584 | 13,141 | 7,690 | 13,369 | 6,312 | ||||
| Asset Fair Value When Terminated | (4,080) | (13,352) | |||||||
| Fair Value Deferred In Other Comprehensive Income | [1] | $ 1,584 | $ 13,141 | $ (4,080) | $ 7,688 | $ (13,345) | $ 13,369 | $ 6,312 | |
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