Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities Interest Spread on Interest Rate Swaps and Caps (Details)

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Derivative Instruments and Hedging Activities Interest Spread on Interest Rate Swaps and Caps (Details) - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative, Notional Amount $ 60,549,307,000 $ 58,777,783,000 $ 48,445,497,000 $ 36,528,169,000
Average Notional Amount 51,015,819,000 47,549,415,000    
Interest Rate Contract [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Net interest expense (income) on interest rate swaps and caps (12,600,000) 23,700,000    
Net Long Position [Member] | Interest Rate Contract [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Average Notional Amount $ 42,700,000,000 $ 37,600,000,000