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Derivative Financial Instruments (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2020
Dec. 31, 2018
Securities Sold under Agreements to Repurchase [Abstract]      
Gross Amounts Recognized $ 172,171   $ 221,450
Gross Amounts Offset in the Statement of Financial Position 0   0
Net Amounts of Liabilities presented in the Statement of Financial Position 172,171   221,450
Financial Instruments 0   0
Fair Value Collateral Posted 172,171   221,450
Net Amount 0   0
Fair value of derivatives in a net liability position 5,200    
Posted collateral 5,200    
Interest rate swap derivatives      
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]      
Asset derivatives (other assets), fair value 5,277   2,217
Liability derivatives (other liabilities), fair value 6,541   2,217
Derivative Asset [Abstract]      
Gross Amounts Offset in the Statement of Financial Position 0   0
Derivative financial instruments 5,277   2,217
Financial Instruments 657   0
Fair Value Collateral Posted 0   0
Net Amount 4,620   2,217
Derivative Liability [Abstract]      
Gross Amounts Offset in the Statement of Financial Position 0   0
Net Amounts of Liabilities presented in the Statement of Financial Position 6,541   2,217
Financial Instruments 657   0
Fair Value Collateral Posted 5,216   0
Net Amount 668   2,217
Derivatives designated as hedging instruments      
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]      
Asset derivatives (other assets), fair value 0   0
Liability derivatives (other liabilities), fair value 1,264   0
Derivatives designated as hedging instruments | Other Assets | Interest Rate Products      
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]      
Derivative Asset, Notional Amount 61,962    
Asset derivatives (other assets), fair value 0   0
Derivatives designated as hedging instruments | Other Liabilities | Interest Rate Products      
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]      
Liability derivatives (other liabilities), fair value 1,264   0
Derivatives not designated as hedging instruments      
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]      
Asset derivatives (other assets), fair value 6,703   3,023
Liability derivatives (other liabilities), fair value 6,703   3,023
Derivatives not designated as hedging instruments | Other Assets | Interest Rate Products      
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]      
Derivative Asset, Notional Amount 523,017    
Asset derivatives (other assets), fair value 5,277   2,217
Derivatives not designated as hedging instruments | Other Assets | Foreign Exchange Forward Contracts      
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]      
Derivative Asset, Notional Amount 1,426    
Asset derivatives (other assets), fair value 1,426   806
Derivatives not designated as hedging instruments | Other Liabilities | Interest Rate Products      
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]      
Liability derivatives (other liabilities), fair value 5,277   2,217
Derivatives not designated as hedging instruments | Other Liabilities | Foreign Exchange Forward Contracts      
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]      
Liability derivatives (other liabilities), fair value $ 1,426   $ 806
Cash Flow Hedging      
Derivative [Line Items]      
Derivative, fixed rate 2.62%    
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income $ 0    
Derivative, Gain (Loss) on Derivative, Net [Abstract]      
Amount of Gain or (Loss) Recognized in OCI on Derivative (1,264)    
Cash Flow Hedging | Interest Rate Products      
Derivative [Line Items]      
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income 0    
Derivative, Gain (Loss) on Derivative, Net [Abstract]      
Amount of Gain or (Loss) Recognized in OCI on Derivative $ (1,264)    
Maximum | Cash Flow Hedging      
Derivative [Line Items]      
Cash flow hedge term 6 years    
Scenario, Forecast | Cash Flow Hedging      
Derivative [Line Items]      
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income   $ 0