Condensed Consolidated Balance Sheets - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
ASSETS:
Cash and due from banks		$ 174,585	$ 150,464
Interest-earning deposits in financial institutions		3,524,613	3,010,197
Total cash, cash equivalents, and restricted cash		3,699,198	3,160,661
Debt Securities, Available-for-sale		9,276,926	5,235,591
Federal Home Loan Bank stock, at cost		17,250	17,250
Total investment securities		9,294,176	5,252,841
Gross loans and leases held for investment		20,588,255	19,153,357
Deferred fees, net		(77,235)	(69,980)
Allowance for loan and lease losses		(203,733)	(348,181)
Total loans and leases held for investment, net	[1]	20,307,287	18,735,196
Equipment leased to others under operating leases		334,275	333,846
Premises and equipment, net		47,246	39,234
Foreclosed assets, net		13,364	14,027
Goodwill		1,204,118	1,078,670
Core deposit and customer relationship intangibles, net		15,533	23,641
Other assets		970,479	860,326
Total assets		35,885,676	29,498,442
LIABILITIES AND STOCKHOLDERS' EQUITY
Noninterest-bearing deposits		12,881,806	9,193,827
Interest-bearing deposits		17,677,939	15,746,890
Total deposits		30,559,745	24,940,717
Borrowings		0	5,000
Subordinated debentures		862,447	465,812
Accrued interest payable and other liabilities		545,050	491,962
Total liabilities		31,967,242	25,903,491
Commitments and contingencies
Preferred Stock, Shares Authorized		5,000,000
Preferred stock ($0.01 par value; 5,000,000 shares authorized; none issued and outstanding)		$ 0	0
Common stock ($0.01 par value, 200,000,000 shares authorized at September 30, 2021 and December 31, 2020; 122,093,755 and 120,736,834 shares issued, respectively, including 2,321,753 and 1,608,126 shares of unvested restricted stock, respectively)		1,221	1,207
Additional paid-in capital		3,035,052	3,100,633
Retained earnings		880,305	409,391
Treasury stock, at cost (2,514,189 and 2,321,981 shares at September 30, 2021 and December 31, 2020)		(97,003)	(88,803)
Accumulated other comprehensive income, net		98,859	172,523
Total stockholders' equity		3,918,434	3,594,951
Total liabilities and stockholders' equity		$ 35,885,676	$ 29,498,442

[1] Excludes accrued interest receivable of $75.7 million and $79.7 million at September 30, 2021 and December 31, 2020, respectively, which is recorded in "Other assets" on the condensed consolidated balance sheets.