Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
ASSETS:
Cash and due from banks	$ 196,502	$ 233,215
Interest-earning deposits in financial institutions	185,284	165,222
Total cash, cash equivalents, and restricted cash	381,786	398,437
Securities available-for-sale, at fair value	3,820,333	3,774,431
Federal Home Loan Bank stock, at cost	31,077	20,790
Total investment securities	3,851,410	3,795,221
Loans held for sale, at lower of cost or fair value	0	481,100
Gross loans and leases held for investment	17,295,589	17,032,221
Deferred fees, net	(65,443)	(59,478)
Allowance for loan and lease losses	(141,920)	(139,456)
Total loans and leases held for investment, net	17,088,226	16,833,287
Equipment leased to others under operating leases	275,707	284,631
Premises and equipment, net	34,012	31,852
Foreclosed assets, net	4,407	1,329
Deferred tax asset, net	41,280	0
Goodwill	2,548,670	2,548,670
Core deposit and customer relationship intangibles, net	62,106	79,626
Other assets	494,522	540,723
Total assets	24,782,126	24,994,876
LIABILITIES AND STOCKHOLDERS' EQUITY
Noninterest-bearing deposits	7,834,480	8,508,044
Interest-bearing deposits	10,045,063	10,357,492
Total deposits	17,879,543	18,865,536
Borrowings	1,513,166	467,342
Subordinated debentures	452,944	462,437
Accrued interest payable and other liabilities	194,788	221,963
Total liabilities	20,040,441	20,017,278
Commitments and contingencies
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, 2018 and December 31, 2017; 125,132,237 and 130,491,108 shares issued, respectively, including 1,529,273 and 1,436,120 shares of unvested restricted stock, respectively)	1,251	1,305
Additional paid-in capital	3,789,893	4,287,487
Retained earnings	1,067,633	723,471
Treasury stock, at cost (1,848,787 and 1,708,230 shares at September 30, 2018 and December 31, 2017)	(73,238)	(65,836)
Accumulated other comprehensive (loss) income, net	(43,854)	31,171
Total stockholders' equity	4,741,685	4,977,598
Total liabilities and stockholders' equity	$ 24,782,126	$ 24,994,876