Condensed Consolidated Balance Sheets - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
ASSETS:
Cash and due from banks		$ 177,199	$ 150,464
Interest-earning deposits in financial institutions		5,517,667	3,010,197
Total cash, cash equivalents, and restricted cash		5,694,866	3,160,661
Securities available-for-sale, at fair value		5,941,690	5,235,591
Federal Home Loan Bank stock, at cost		17,250	17,250
Total investment securities		5,958,940	5,252,841
Loans Receivable Held-for-sale, Amount		25,554	0
Gross loans and leases held for investment		19,055,165	19,153,357
Deferred fees, net		(75,937)	(69,980)
Allowance for loan and lease losses		(292,445)	(348,181)
Total loans and leases held for investment, net	[1]	18,686,783	18,735,196
Equipment leased to others under operating leases		327,413	333,846
Premises and equipment, net		39,622	39,234
Foreclosed assets, net		14,298	14,027
Goodwill		1,204,092	1,078,670
Core deposit and customer relationship intangibles, net		21,312	23,641
Other assets		883,653	860,326
Total assets		32,856,533	29,498,442
LIABILITIES AND STOCKHOLDERS' EQUITY
Noninterest-bearing deposits		11,017,462	9,193,827
Interest-bearing deposits		17,205,829	15,746,890
Total deposits		28,223,291	24,940,717
Borrowings		19,750	5,000
Subordinated debentures		465,814	465,812
Accrued interest payable and other liabilities		493,541	491,962
Total liabilities		29,202,396	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 March 31, 2021 and December 31, 2020; 121,480,278 and 120,736,834 shares issued, respectively, including 2,189,181 and 1,608,126 shares of unvested restricted stock, respectively)		1,215	1,207
Additional paid-in capital		3,077,455	3,100,633
Retained earnings		559,797	409,391
Treasury stock, at cost (2,374,636 and 2,321,981 shares at March 31, 2021 and December 31, 2020)		(90,711)	(88,803)
Accumulated other comprehensive income, net		106,381	172,523
Total stockholders' equity		3,654,137	3,594,951
Total liabilities and stockholders' equity		$ 32,856,533	$ 29,498,442

[1] Excludes accrued interest receivable of $76.3 million and $79.7 million at March 31, 2021 and December 31, 2020, respectively, which is recorded in "Other assets" on the condensed consolidated balance sheets.