Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
ASSETS:
Cash and due from banks	$ 224,758	$ 175,830
Interest-earning deposits in financial institutions	332,124	209,937
Total cash, cash equivalents, and restricted cash	556,882	385,767
Securities available-for-sale, at fair value	3,994,708	4,009,431
Federal Home Loan Bank stock, at cost	29,430	32,103
Total investment securities	4,024,138	4,041,534
Loans held for sale	25,124	0
Gross loans and leases held for investment	18,371,295	18,026,365
Deferred fees, net	(63,598)	(68,652)
Allowance for loan and lease losses	(136,281)	(132,472)
Total loans and leases held for investment, net	18,171,416	17,825,241
Equipment leased to others under operating leases	293,853	292,677
Premises and equipment, net	37,783	34,661
Foreclosed assets, net	3,291	5,299
Deferred tax asset, net	0	17,489
Goodwill	2,548,670	2,548,670
Core deposit and customer relationship intangibles, net	52,250	57,120
Other assets	610,731	522,896
Total assets	26,324,138	25,731,354
LIABILITIES AND STOCKHOLDERS' EQUITY
Noninterest-bearing deposits	7,712,409	7,888,915
Interest-bearing deposits	11,573,518	10,981,586
Total deposits	19,285,927	18,870,501
Borrowings	1,481,087	1,371,114
Subordinated debentures	454,458	453,846
Accrued interest payable and other liabilities	311,684	210,305
Total liabilities	21,533,156	20,905,766
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 March 31, 2019 and December 31, 2018; 122,204,565 and 125,079,705 shares issued, respectively, including 1,241,543 and 1,888,872 shares of unvested restricted stock, respectively)	1,222	1,251
Additional paid-in capital	3,535,793	3,722,723
Retained earnings	1,296,216	1,182,674
Treasury stock, at cost (2,003,416 and 1,889,872 shares at March 31, 2019 and December 31, 2018)	(79,507)	(74,985)
Accumulated other comprehensive income (loss), net	37,258	(6,075)
Total stockholders' equity	4,790,982	4,825,588
Total liabilities and stockholders' equity	$ 26,324,138	$ 25,731,354