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Derivative Instruments (Tables)
12 Months Ended
Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Derivative Instruments
The following table summarizes the interest rate derivatives we entered into over the applicable periods:
Year Ended December 31,
Interest rate caps:202020192018
Notional amount (in thousands)$602,500 $391,000 $727,000 
Strike rate low end of range3.00 %3.00 %2.43 %
Strike rate high end of range4.00 %7.80 %7.80 %
Effective date rangeMarch 2020 - June 2020January 2019 - December 2019February 2018 - December 2018
Termination date rangeApril 2021 - June 2021March 2020 - October 2021March 2019 - June 2020
Total cost of interest rate caps (in thousands)$92 $115 $362 
Interest rate floors:
Notional amount (in thousands)$— $2,000,000 $4,000,000 
Strike rate low end of range1.63 %1.38 %
Strike rate high end of range1.63 %2.00 %
Effective dateJanuary 2019July 2018
Termination date March 2020June 2019 - September 2019
Total cost of interest rate floors (in thousands)$— $75 $138 
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No instruments were designated as cash flow hedges.
Interest rate derivatives consisted of the following:
Interest rate caps: (1)
December 31, 2020December 31, 2019
Notional amount (in thousands)$779,000 $968,000 
Strike rate low end of range3.00 %3.00 %
Strike rate high end of range4.00 %7.80 %
Termination date rangeFebruary 2021 - October 2021January 2020 - October 2021
Aggregate principal balance on corresponding mortgage loans (in thousands)$779,000 $870,000 
Interest rate floors: (1) (2)
Notional amount (in thousands)$— $5,000,000 
Strike rate low end of range(0.25)%
Strike rate high end of range1.63 %
Termination date rangeMarch 2020 - July 2020
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(1)No instruments were designated as cash flow hedges.
(2)Cash collateral is posted by us as well as our counterparties. We offset the fair value of the derivative and the obligation/right to return/reclaim cash collateral.