Derivatives and Hedging Activities (Offsetting Derivatives) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gross Amounts of Recognized Assets	$ 392		$ 4,633
Gross Amounts of Recognized (Liabilities)	(5,305)		0
Gross Amounts Offset in the Consolidated Balance Sheet	0		0
Net Amounts of Assets presented in the Consolidated Balance Sheet	392		4,633
Net Amounts of Assets presented in the Consolidated Balance Sheet	5,305		0
Gross Amounts Not Offset in Consolidated Balance Sheet, Financial Instruments	0		0
Gross Amounts Not Offset in Consolidated Balance Sheet, Cash Collateral Received	0		0
Net Amount	$ 392		$ 4,633
Net Amount		$ 5,305

Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.

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