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Derivatives and Hedging - Fair Value Hedges (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (loss) related to hedge, firm commitments no longer qualifying as a fair value hedge $ 0 $ 0  
Derivatives designated as hedging instrument | Fair value hedges | Interest rate swap      
Derivative Instruments, Gain (Loss) [Line Items]      
Fair value hedges, weighted average expected remaining term 3 years 25 days    
Long-term debt      
Derivative Instruments, Gain (Loss) [Line Items]      
Carrying amount of hedging liabilities $ 3,484,746   $ 3,483,177
Cumulative amount of fair value hedging adjustment included in the carrying amount of hedged liabilities - Hedged items currently designated 124,221   25,092
Cumulative amount of fair value hedging adjustment included in the carrying amount of hedged liabilities - Hedged items no longer designated $ 1,335   $ 1,883