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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Interest receivable - consolidated trusts amount | $ 186,429,000 | $ 199,195,000
Accrued interest payable - consolidated trusts amount | 92,738,000 | 106,959,000
Available-for-Sale Securities |  |
Amortized cost of available-for-sale investment securities | 3,843,666,000 | 2,961,430,000
Farmer Mac Guaranteed Securities: |  |
Amortized cost of available-for-sale investment securities | 6,594,992,000 | 7,016,971,000
Consolidated VIEs: |  |
Interest receivable - consolidated trusts amount | 16,401,000 | 20,568,000
Accrued interest payable - consolidated trusts amount | $ 14,370,000 | $ 18,018,000
Series A |  |
Preferred stock, par value (in dollars per share) | $ 25 | $ 25
Preferred stock, shares authorized (in shares) | 2,400,000 | 2,400,000
Preferred stock, shares issued (in shares) | 2,400,000 | 2,400,000
Preferred stock, shares outstanding (in shares) | 2,400,000 | 2,400,000
Preferred stock, redemption amount | $ 60,000,000 |
Series C |  |
Preferred stock, par value (in dollars per share) | $ 25 | $ 25
Preferred stock, shares authorized (in shares) | 3,000,000 | 3,000,000
Preferred stock, shares issued (in shares) | 3,000,000 | 3,000,000
Preferred stock, shares outstanding (in shares) | 3,000,000 | 3,000,000
Series D |  |
Preferred stock, par value (in dollars per share) | $ 25 | $ 25
Preferred stock, shares authorized (in shares) | 4,000,000 | 4,000,000
Preferred stock, shares issued (in shares) | 4,000,000 | 4,000,000
Preferred stock, shares outstanding (in shares) | 4,000,000 | 4,000,000
Series E |  |
Preferred stock, par value (in dollars per share) | $ 25 | $ 25
Preferred stock, shares authorized (in shares) | 3,180,000 | 3,180,000
Preferred stock, shares issued (in shares) | 3,180,000 | 3,180,000
Preferred stock, shares outstanding (in shares) | 3,180,000 | 3,180,000
Series F |  |
Preferred stock, par value (in dollars per share) | $ 25 | $ 25
Preferred stock, shares authorized (in shares) | 4,800,000 | 4,800,000
Preferred stock, shares issued (in shares) | 4,800,000 | 4,800,000
Preferred stock, shares outstanding (in shares) | 4,800,000 | 4,800,000
Class A voting common stock |  |
Common stock, par value (in dollars per share) | $ 1 | $ 1
Common stock, shares outstanding (in shares) | 1,030,780 | 1,030,780
Class B voting common stock |  |
Common stock, par value (in dollars per share) | $ 1 | $ 1
Common stock, shares outstanding (in shares) | 500,301 | 500,301
Class C non-voting common stock |  |
Common stock, par value (in dollars per share) | $ 1 | $ 1
Common stock, shares outstanding (in shares) | 9,205,897 | 9,180,744

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