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Derivative Financial Instruments - Derivative Financial Instruments, their Fair Values, and Balance Sheet Location (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Derivatives Fair Value [Line Items]    
Asset Derivatives $ 55,481 $ 96,167
Liability Derivatives 18,430 18,161
Interest Rate Lock Commitments    
Derivatives Fair Value [Line Items]    
Asset Derivatives 2,207 4,947
Liability Derivatives 0 0
Forward Commitments    
Derivatives Fair Value [Line Items]    
Asset Derivatives 20 0
Liability Derivatives 273 740
Interest Rate Swap Agreements    
Derivatives Fair Value [Line Items]    
Asset Derivatives 52,779 90,342
Liability Derivatives 17,029 17,409
Foreign Exchange Contracts    
Derivatives Fair Value [Line Items]    
Asset Derivatives 475 878
Liability Derivatives $ 1,128 $ 12