Derivatives and Hedging Activities Derivatives (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Derivative [Line Items]
Derivative, Notional Amount	$ 155,300,000	$ 295,700,000
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative, Notional Amount	81,100,000	87,900,000
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 74,200,000	$ 207,800,000