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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
ASSETS |  |
Available-for-sale securities pledged as collateral | $ 577,503 | $ 767,437
Held-to-maturity investment security, fair value | 121,803 | 144,593
Allowance for loan losses | 276,316 | 260,520
Loans held-for-investment pledged as collateral | 17,587,542 | 16,441,068
Premises and equipment, accumulated depreciation | $ 105,918 | $ 114,890
STOCKHOLDERS’ EQUITY |  |
Common stock, par value (in dollars per share) | $ 0.001 | $ 0.001
Common stock, shares authorized (in shares) | 200,000,000 | 200,000,000
Common stock, shares issued (in shares) | 165,146,350 | 164,604,072
Treasury stock, shares (in shares) | 20,660,024 | 20,436,621

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