Derivative and Hedging Activities - Fair Value of Derivatives (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Derivatives Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 38,877	$ 14,405
Liability Derivatives	39,356	14,766
Derivatives Not Designated as Hedging Instrument | Other Assets | Interest Rate Products
Derivatives, Fair Value [Line Items]
Asset Derivatives	38,830	14,154
Derivatives Not Designated as Hedging Instrument | Other Assets | Credit Risk Contract
Derivatives, Fair Value [Line Items]
Asset Derivatives	47	251
Derivatives Not Designated as Hedging Instrument | Other Liabilities | Interest Rate Products
Derivatives, Fair Value [Line Items]
Liability Derivatives	39,356	14,766
Derivatives Not Designated as Hedging Instrument | Other Liabilities | Credit Risk Contract
Derivatives, Fair Value [Line Items]
Liability Derivatives	0	0
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Asset Derivatives	428	1,229
Liability Derivatives	0	0
Designated as Hedging Instrument | Other Assets | Interest Rate Products
Derivatives, Fair Value [Line Items]
Asset Derivatives	428	1,229
Designated as Hedging Instrument | Other Liabilities | Interest Rate Products
Derivatives, Fair Value [Line Items]
Liability Derivatives	$ 0	$ 0