Consolidated Statements of Financial Condition - USD ($) shares in Thousands, $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets
Cash and due from banks	$ 270,020	$ 196,364
Interest-bearing deposits in other banks	1,654,917	920,880
Equity securities, at fair value	114,848	76,404
Securities available-for-sale, at fair value	3,212,908	3,096,408
Securities held-to-maturity, at amortized cost, net	10,853	12,071
Federal Home Loan Bank ("FHLB") and Federal Reserve Bank ("FRB") stock, at cost	106,090	117,420
Loans	14,788,732	14,751,232
Allowance for loan losses	(206,241)	(239,017)
Net loans	14,582,491	14,512,215
Other real estate owned ("OREO")	5,106	8,253
Premises, furniture, and equipment, net	123,413	132,045
Investment in bank-owned life insurance ("BOLI")	300,387	301,101
Goodwill and other intangible assets	923,383	932,764
Accrued interest receivable and other assets	473,764	532,753
Total assets	21,778,180	20,838,678
Liabilities
Noninterest-bearing deposits	6,097,698	5,797,899
Interest-bearing deposits	11,100,704	10,214,565
Total deposits	17,198,402	16,012,464
Borrowed funds	1,274,572	1,546,414
Senior and subordinated debt	235,383	234,768
Accrued interest payable and other liabilities	346,600	355,026
Total liabilities	19,054,957	18,148,672
Stockholders' Equity
Preferred stock	230,500	230,500
Common stock	1,254	1,254
Additional paid-in capital	1,273,148	1,275,492
Retained earnings	1,479,481	1,388,525
Accumulated other comprehensive income (loss), net of tax	(25,381)	26,379
Treasury stock, at cost	(235,779)	(232,144)
Total stockholders' equity	2,723,223	2,690,006
Total liabilities and stockholders' equity	$ 21,778,180	$ 20,838,678
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	1,000
Common stock, shares authorized (in shares)	250,000	250,000
Preferred stock, shares issued (in shares)	231	231
Common stock, shares issued (in shares)	125,380	125,367
Preferred stock, shares outstanding (in shares)	231	231
Common stock, shares outstanding (in shares)	114,167	114,296
Treasury stock, shares (in shares)	11,213	11,071