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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Amortized Cost | $ 247,607 | $ 211,406
Loans held for investment | $ 251,475 | $ 184,701
Preferred stock, stated value (in dollars per share) | $ 0.20 | $ 0.20
Preferred stock, shares authorized (in shares) | 20,000,000 | 20,000,000
Common stock, par value (in dollars per share) | $ 0.20 | $ 0.20
Common stock, shares authorized (in shares) | 1,125,000,000 | 1,125,000,000
Common stock, shares issued (in shares) | 443,500,000 | 436,600,000
Accumulated other comprehensive loss tax benefit | $ 1,696 | $ (5,364)
Common stock held in treasury | 11,100,000 | 7,700,000
Series A Preferred Stock |  |
Preferred stock, stated value (in dollars per share) | $ 50 | $ 50
Preferred stock, shares issued (in shares) | 0 | 3,300,000
Series B Preferred Stock |  |
Preferred stock, stated value (in dollars per share) | $ 100 | $ 100
Preferred stock, shares issued (in shares) | 4,000,000 | 4,000,000

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