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Consolidated Balance Sheet (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
ASSETS    
Available-for-sale (AFS) debt securities, at amortized cost $ 10,087,179 $ 5,470,523
Available-for-sale debt securities pledged as collateral at fair value 803,896 588,484
Allowance for loan losses 541,579 619,983
Loans held-for-investment pledged as collateral 27,672,561 23,263,517
Premises and equipment, accumulated depreciation $ 139,358 $ 127,884
STOCKHOLDERS’ EQUITY    
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 200,000,000 200,000,000
Common stock, shares issued (in shares) 167,790,645 167,240,600
Treasury stock, shares (in shares) 25,882,691 25,675,371