Derivatives (Schedule of Open Interest Rate Contracts) (Details) - Long $ in Millions	Dec. 31, 2020 USD ($)
Interest rate component of debt - not accounted for as a hedge | Swap
Derivative [Line Items]
Initial Notional Amount	$ 23.0
Interest Rate	1.90%
Interest rate component of debt - not accounted for as a hedge | Collar
Derivative [Line Items]
Initial Notional Amount	$ 40.0
Interest rate component of debt - not accounted for as a hedge | Collar | Minimum
Derivative [Line Items]
Interest Rate	3.50%
Interest rate component of debt - not accounted for as a hedge | Collar | Maximum
Derivative [Line Items]
Interest Rate	4.80%
Interest rate component of debt - accounted for as a hedge | Swap
Derivative [Line Items]
Initial Notional Amount	$ 20.0
Interest Rate	1.80%
Interest rate component of debt - accounted for as a hedge | Swap
Derivative [Line Items]
Initial Notional Amount	$ 10.0
Interest Rate	2.60%
Interest rate component of debt - accounted for as a hedge | Swap
Derivative [Line Items]
Initial Notional Amount	$ 20.0
Interest Rate	2.70%
Interest rate component of debt - accounted for as a hedge | Swap
Derivative [Line Items]
Initial Notional Amount	$ 100.0
Interest Rate	2.50%
Interest rate component of debt - accounted for as a hedge | Swap
Derivative [Line Items]
Initial Notional Amount	$ 50.0
Interest Rate	2.50%
Interest rate component of debt - accounted for as a hedge | Swap
Derivative [Line Items]
Initial Notional Amount	$ 50.0
Interest Rate	2.50%
Interest rate component of debt - accounted for as a hedge | Swap
Derivative [Line Items]
Initial Notional Amount	$ 50.0
Interest rate component of debt - accounted for as a hedge | Swap | Minimum
Derivative [Line Items]
Interest Rate	0.00%
Interest rate component of debt - accounted for as a hedge | Swap | Maximum
Derivative [Line Items]
Interest Rate	0.80%
Interest rate component of debt - accounted for as a hedge | Swap
Derivative [Line Items]
Initial Notional Amount	$ 50.0
Interest rate component of debt - accounted for as a hedge | Swap | Minimum
Derivative [Line Items]
Interest Rate	0.00%
Interest rate component of debt - accounted for as a hedge | Swap | Maximum
Derivative [Line Items]
Interest Rate	0.70%
Interest rate component of debt - accounted for as a hedge | Swap
Derivative [Line Items]
Initial Notional Amount	$ 50.0
Interest rate component of debt - accounted for as a hedge | Swap | Minimum
Derivative [Line Items]
Interest Rate	0.00%
Interest rate component of debt - accounted for as a hedge | Swap | Maximum
Derivative [Line Items]
Interest Rate	0.80%
Interest rate component of debt - accounted for as a hedge | Swap
Derivative [Line Items]
Initial Notional Amount	$ 50.0
Interest rate component of debt - accounted for as a hedge | Swap | Minimum
Derivative [Line Items]
Interest Rate	0.00%
Interest rate component of debt - accounted for as a hedge | Swap | Maximum
Derivative [Line Items]
Interest Rate	0.80%