Derivatives and Hedging Activities Derivatives Fair Value and Balance Sheet Classification (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Other assets
Derivatives, Fair Value [Line Items]
Asset derivatives	$ 93,437	$ 36,099
Other assets | Derivatives not designated as hedging instruments: | Interest rate swaps
Derivatives, Fair Value [Line Items]
Asset derivatives	93,391	36,089
Other assets | Derivatives not designated as hedging instruments: | Risk participation agreements
Derivatives, Fair Value [Line Items]
Asset derivatives	46	10
Other liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	94,917	36,822
Other liabilities | Derivatives not designated as hedging instruments: | Interest rate swaps
Derivatives, Fair Value [Line Items]
Liability derivatives	94,437	36,580
Other liabilities | Derivatives not designated as hedging instruments: | Risk participation agreements
Derivatives, Fair Value [Line Items]
Liability derivatives	$ 480	$ 242