Derivative Financial Instruments - Fair Value of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	$ 38,806	$ 11,686
Total Liability Derivatives	47,620	15,899
Derivatives designated as hedging instruments
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	37,537	11,422
Total Liability Derivatives	47,620	15,861
Derivatives designated as hedging instruments | Interest rate contracts | Other assets
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	37,537	11,422
Derivatives designated as hedging instruments | Interest rate contracts | Other liabilities
Derivatives, Fair Value [Line Items]
Total Liability Derivatives	47,620	15,861
Derivatives not designated as hedging instruments
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	1,269	264
Total Liability Derivatives	0	38
Derivatives not designated as hedging instruments | Mortgage loan contracts | Other assets
Derivatives, Fair Value [Line Items]
Total Asset Derivatives	1,269	264
Derivatives not designated as hedging instruments | Mortgage loan contracts | Other liabilities
Derivatives, Fair Value [Line Items]
Total Liability Derivatives	$ 0	$ 38