Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets
Cash and due from banks	$ 254,212	$ 214,894
Interest-bearing deposits in other banks	936,528	84,327
Equity securities, at fair value	55,021	42,136
Securities available-for-sale, at fair value	3,279,884	2,873,386
Securities held-to-maturity, at amortized cost, net	22,193	21,997
Federal Home Loan Bank ("FHLB") and Federal Reserve Bank ("FRB") stock, at cost	138,120	115,409
Loans	14,653,188	12,840,330
Allowance for loan losses	(239,048)	(108,022)
Net loans	14,414,140	12,732,308
Other real estate owned ("OREO")	6,552	8,750
Premises, furniture, and equipment, net	132,267	147,996
Investment in bank-owned life insurance ("BOLI")	300,429	296,351
Goodwill and other intangible assets	935,801	875,262
Accrued interest receivable and other assets	612,996	437,581
Total assets	21,088,143	17,850,397
Liabilities
Noninterest-bearing deposits	5,555,735	3,802,422
Interest-bearing deposits	10,215,838	9,448,856
Total deposits	15,771,573	13,251,278
Borrowed funds	1,957,180	1,658,758
Senior and subordinated debt	234,563	233,948
Accrued interest payable and other liabilities	460,656	335,620
Total liabilities	18,423,972	15,479,604
Stockholders' Equity
Preferred stock	230,500	0
Common stock	1,254	1,204
Additional paid-in capital	1,271,859	1,211,274
Retained earnings	1,366,986	1,380,612
Accumulated other comprehensive income (loss), net of tax	25,749	(1,954)
Treasury stock, at cost	(232,177)	(220,343)
Total stockholders' equity	2,664,171	2,370,793
Total liabilities and stockholders' equity	$ 21,088,143	$ 17,850,397
Stockholders' Equity, Number of Shares, Par Value, and Other Disclosures
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Common stock, shares authorized (in shares)	250,000,000	250,000,000
Preferred stock, shares issued (in shares)	231,000	0
Common stock, shares issued (in shares)	125,360,000	120,415,000
Preferred stock, shares outstanding (in shares)	231,000	0
Common stock, shares outstanding (in shares)	114,293,000	109,972,000
Treasury stock, shares (in shares)	11,067,000	10,443,000