Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVES - Derivatives Notional Amount (Details)

v3.19.1
DERIVATIVES - Derivatives Notional Amount (Details) - Not Designated as Hedging Instrument - USD ($)
3 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Interest Rate Caps    
Derivative [Line Items]    
Derivative asset, notional amount $ 50,000,000 $ 50,000,000
Weighted average maturity (in months) 20 months  
Interest Rate Swaps    
Derivative [Line Items]    
Derivative asset, notional amount $ 4,280,000,000  
Derivative liability, notional amount   4,725,000,000
Weighted average maturity (in months) 47 months  
Weighted average fixed pay rate 3.21%  
Interest Rate Lock Commitments    
Derivative [Line Items]    
Derivative asset, notional amount $ 1,215,284,000 823,187,000
Forward Loan Sale Commitments    
Derivative [Line Items]    
Derivative asset, notional amount 2,997,000 30,274,000
TBAs | Short    
Derivative [Line Items]    
Derivative liability, notional amount 6,816,700,000 5,904,300,000
TBAs | Long    
Derivative [Line Items]    
Derivative liability, notional amount $ 8,474,218,000 $ 5,067,200,000
Interest Rate Cap, Contract Two    
Derivative [Line Items]    
Derivative, cap interest rate 4.00%  
Notional amount of derivatives $ 50,000,000.0