Derivatives (Outstanding Interest Rate Derivatives) (Details) - Long-term $ in Millions	Sep. 30, 2023 USD ($)
Not Accounted for as Hedge | Swap 0.0% to 0.8% | Minimum
Derivative [Line Items]
Interest rate	0.00%
Not Accounted for as Hedge | Swap 0.0% to 0.8% | Maximum
Derivative [Line Items]
Interest rate	0.80%
Not Accounted for as Hedge | Swap 0.0% to 0.8% | Minimum
Derivative [Line Items]
Interest rate	0.00%
Not Accounted for as Hedge | Swap 0.0% to 0.8% | Maximum
Derivative [Line Items]
Interest rate	0.80%
Accounted for as Hedge | Swap 2.3%
Derivative [Line Items]
Notional amount	$ 95.3
Interest rate	2.30%
Accounted for as Hedge | Swap 2.4%
Derivative [Line Items]
Notional amount	$ 47.7
Interest rate	2.40%
Accounted for as Hedge | Swap 2.4%
Derivative [Line Items]
Notional amount	$ 47.7
Interest rate	2.40%
Accounted for as Hedge | Swap 0.0% to 0.8%
Derivative [Line Items]
Notional amount	$ 50.0
Accounted for as Hedge | Swap 0.0% to 0.8%
Derivative [Line Items]
Notional amount	50.0
Accounted for as Hedge | Swap, 2.6%
Derivative [Line Items]
Notional amount	$ 20.0
Interest rate	2.60%
Accounted for as Hedge | Swap 2.0%
Derivative [Line Items]
Notional amount	$ 100.0
Interest rate	2.00%
Accounted for as Hedge | Swap 2.4%
Derivative [Line Items]
Notional amount	$ 50.0
Interest rate	2.40%
Accounted for as Hedge | Swap 3.7%
Derivative [Line Items]
Notional amount	$ 50.0
Interest rate	3.70%
Accounted for as Hedge | Swap 3.7%
Derivative [Line Items]
Notional amount	$ 50.0
Interest rate	3.70%
Accounted for as Hedge | Swap 2.9%
Derivative [Line Items]
Notional amount	$ 50.0
Interest rate	2.90%