Annual report pursuant to Section 13 and 15(d)

DERIVATIVES - Notional Amount (Details)

v3.20.4
DERIVATIVES - Notional Amount (Details) - Not Designated as Hedging Instrument - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Interest Rate Caps      
Derivative [Line Items]      
Derivative asset, notional amount   $ 0 $ 12,500
Derivative, cap interest rate     4.00%
Derivative, notional amount     $ 12,500
Interest Rate Swaps      
Derivative [Line Items]      
Derivative asset, notional amount   6,515,000 $ 4,900,000
Interest Rate Swaps | Short      
Derivative [Line Items]      
Derivative asset, notional amount   $ 0  
Derivative, cap interest rate   0.00% 1.90%
Derivative, notional amount     $ 900,000
Average remaining maturity (in months) 87 months 0 months  
Interest Rate Swaps | Long      
Derivative [Line Items]      
Derivative, cap interest rate   2.20% 0.00%
Derivative, notional amount   $ 6,500,000 $ 0
Average remaining maturity (in months) 36 months 47 months  
Interest Rate Lock Commitments      
Derivative [Line Items]      
Derivative asset, notional amount   $ 15,031,345 4,043,935
Forward Loan Sale Commitments      
Derivative [Line Items]      
Derivative asset, notional amount   0 43,654
TBAs | Short      
Derivative [Line Items]      
Derivative liability, notional amount   23,529,408 5,048,000
TBAs | Long      
Derivative [Line Items]      
Derivative liability, notional amount   $ 0 $ 11,692,212