Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
ASSETS:
Cash and due from banks	$ 245,998	$ 233,215
Interest-earning deposits in financial institutions	205,567	165,222
Total cash, cash equivalents, and restricted cash	451,565	398,437
Securities available-for-sale, at fair value	3,857,788	3,774,431
Federal Home Loan Bank stock, at cost	26,271	20,790
Total investment securities	3,884,059	3,795,221
Loans held for sale, at lower of cost or fair value	0	481,100
Gross loans and leases held for investment	16,947,502	17,032,221
Deferred fees, net	(62,310)	(59,478)
Allowance for loan and lease losses	(132,139)	(139,456)
Total loans and leases held for investment, net	16,753,053	16,833,287
Equipment leased to others under operating leases	266,576	284,631
Premises and equipment, net	34,513	31,852
Foreclosed assets, net	2,231	1,329
Deferred tax asset, net	25,551	0
Goodwill	2,548,670	2,548,670
Core deposit and customer relationship intangibles, net	67,693	79,626
Other assets	495,646	540,723
Total assets	24,529,557	24,994,876
LIABILITIES AND STOCKHOLDERS' EQUITY
Noninterest-bearing deposits	8,126,153	8,508,044
Interest-bearing deposits	9,803,039	10,357,492
Total deposits	17,929,192	18,865,536
Borrowings	1,187,226	467,342
Subordinated debentures	451,878	462,437
Accrued interest payable and other liabilities	183,302	221,963
Total liabilities	19,751,598	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 June 30, 2018 and December 31, 2017; 126,412,538 and 130,491,108 shares issued, respectively, including 1,545,867 and 1,436,120 shares of unvested restricted stock, respectively)	1,264	1,305
Additional paid-in capital	3,920,715	4,287,487
Retained earnings	951,346	723,471
Treasury stock, at cost (1,844,588 and 1,708,230 shares at June 30, 2018 and December 31, 2017)	(73,026)	(65,836)
Accumulated other comprehensive (loss) income, net	(22,340)	31,171
Total stockholders' equity	4,777,959	4,977,598
Total liabilities and stockholders' equity	$ 24,529,557	$ 24,994,876