Consolidated Statements of Financial Condition - USD ($) shares in Thousands, $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Assets
Cash and due from banks	$ 232,989	$ 196,364
Interest-bearing deposits in other banks	1,312,412	920,880
Equity securities, at fair value	112,977	76,404
Securities available-for-sale, at fair value	3,156,194	3,096,408
Securities held-to-maturity, at amortized cost, net	11,593	12,071
Federal Home Loan Bank ("FHLB") and Federal Reserve Bank ("FRB") stock, at cost	106,890	117,420
Loans	15,035,219	14,751,232
Allowance for loan losses	(214,601)	(239,017)
Net loans	14,820,618	14,512,215
Other real estate owned ("OREO")	5,289	8,253
Premises, furniture, and equipment, net	125,837	132,045
Investment in bank-owned life insurance ("BOLI")	300,537	301,101
Goodwill and other intangible assets	926,176	932,764
Accrued interest receivable and other assets	513,912	532,753
Total assets	21,625,424	20,838,678
Liabilities
Noninterest-bearing deposits	6,187,478	5,797,899
Interest-bearing deposits	10,845,405	10,214,565
Total deposits	17,032,883	16,012,464
Borrowed funds	1,299,424	1,546,414
Senior and subordinated debt	235,178	234,768
Accrued interest payable and other liabilities	353,791	355,026
Total liabilities	18,921,276	18,148,672
Stockholders' Equity
Preferred stock	230,500	230,500
Common stock	1,254	1,254
Additional paid-in capital	1,269,192	1,275,492
Retained earnings	1,444,625	1,388,525
Accumulated other comprehensive income (loss), net of tax	(5,941)	26,379
Treasury stock, at cost	(235,482)	(232,144)
Total stockholders' equity	2,704,148	2,690,006
Total liabilities and stockholders' equity	$ 21,625,424	$ 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)	125,376	125,367
Preferred stock, shares outstanding (in shares)	231	231
Common stock, shares outstanding (in shares)	114,177	114,296
Treasury stock, shares (in shares)	11,199	11,071