CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
ASSETS
Cash and cash equivalents		$ 1,360,887	$ 1,039,885
Short-term investments		299,916	338,714
Securities purchased under resale agreements (“resale agreements”)		1,600,000	1,225,000
Available-for-sale investment securities, at fair value		3,773,226	2,626,617
Loans held for sale		31,958	45,950
Loans held-for-investment (net of allowance for loan losses of $264,959 in 2015 and $261,679 in 2014)		23,378,789	21,468,270
Investment in Federal Home Loan Bank (“FHLB”) stock, at cost		28,770	31,239
Investment in Federal Reserve Bank stock, at cost		54,932	54,451
Investments in qualified affordable housing partnerships, net	[1]	193,978	178,962
Premises and equipment (net of accumulated depreciation of $100,060 in 2015 and $85,409 in 2014)		166,993	180,900
Goodwill		469,433	469,433
Other assets	[1]	992,040	1,084,171
TOTAL	[1]	32,350,922	28,743,592
Customer deposits:
Noninterest-bearing		8,656,805	7,381,030
Interest-bearing		18,819,176	16,627,744
Total deposits		27,475,981	24,008,774
FHLB advances		1,019,424	317,241
Securities sold under repurchase agreements (“repurchase agreements”)		0	795,000
Long-term debt		206,084	225,848
Accrued expenses and other liabilities		526,483	540,618
Total liabilities		$ 29,227,972	$ 25,887,481
COMMITMENTS AND CONTINGENCIES (Note 14)
STOCKHOLDERS’ EQUITY
Common stock, $0.001 par value, 200,000,000 shares authorized; 164,246,517 and 163,772,218 shares issued in 2015 and 2014, respectively.		$ 164	$ 164
Additional paid in capital		1,701,295	1,677,767
Retained earnings	[1]	1,872,594	1,604,141
Treasury stock at cost—20,337,284 shares in 2015 and 20,189,989 shares in 2014.		(436,162)	(430,198)
Accumulated other comprehensive (loss) income (“AOCI”), net of tax		(14,941)	4,237
Total stockholders' equity	[1]	3,122,950	2,856,111
TOTAL	[1]	$ 32,350,922	$ 28,743,592

[1] Prior period was restated to reflect the retrospective application of adopting the new accounting guidance related to the Company’s investments in qualified affordable housing projects Accounting Standards Update (“ASU”) 2014-01. Please see Note 9 — Investments in Qualified Affordable Housing Partnerships, Tax Credit and Other Investments, Net to the Consolidated Financial Statements for additional information.