Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.3
Derivative Instruments and Hedging Activities Interest Spread on Interest Rate Swaps and Caps (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Jun. 30, 2019
Dec. 31, 2018
Jun. 30, 2018
Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]                
Derivative, Notional Amount $ 54,226,205,000 $ 41,330,283,000 $ 54,226,205,000 $ 41,330,283,000 $ 55,549,424,000 $ 36,528,169,000 $ 28,618,861,000 $ 31,226,878,000
Average Notional Amount 54,069,162,000 37,022,610,000 52,960,859,000 27,181,648,000        
Interest Rate Contract [Member]                
Derivative Instruments, Gain (Loss) [Line Items]                
Net interest expense (income) on interest rate swaps and caps 19,200,000 16,200,000 65,700,000 33,900,000        
Net Long Position [Member] | Interest Rate Contract [Member]                
Derivative Instruments, Gain (Loss) [Line Items]                
Average Notional Amount $ 41,200,000,000 $ 31,800,000,000 $ 39,800,000,000 $ 26,200,000,000