Derivatives and Hedging Activities (Fair Value) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Derivatives Not Designated as a Hedging Instruments
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 118,877	$ 38,877
Liability Derivatives	120,176	39,356
Derivatives Not Designated as a Hedging Instruments | Other Assets | Interest rate products
Derivatives, Fair Value [Line Items]
Asset Derivatives	118,787	38,830
Derivatives Not Designated as a Hedging Instruments | Other Assets | Credit contracts
Derivatives, Fair Value [Line Items]
Asset Derivatives	90	47
Derivatives Not Designated as a Hedging Instruments | Other Liabilities | Interest rate products
Derivatives, Fair Value [Line Items]
Liability Derivatives	120,176	39,356
Derivatives Not Designated as a Hedging Instruments | Other Liabilities | Credit contracts
Derivatives, Fair Value [Line Items]
Liability Derivatives	0	0
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Asset Derivatives	(7,269)	428
Liability Derivatives	0	0
Designated as Hedging Instrument | Other Assets | Interest rate products
Derivatives, Fair Value [Line Items]
Asset Derivatives	(7,269)	428
Designated as Hedging Instrument | Other Liabilities | Interest rate products
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 0	$ 0