CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Interest receivable - Consolidated Trusts amount	$ 154,836	$ 199,195
Accrued interest payable - Consolidated Trusts amount	104,380	106,959
Available-for-Sale Securities
Amortized cost of available-for-sale investment securities	2,959,694	2,961,430
Farmer Mac Guaranteed Securities:
Amortized cost of available-for-sale investment securities	7,273,303	7,016,971
Variable Interest Entity, Primary Beneficiary
Interest receivable - Consolidated Trusts amount	11,944	20,568
Accrued interest payable - Consolidated Trusts amount	$ 9,588	$ 18,018
5.875% Non-Cumulative Preferred Stock, 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
6.000% Fixed-to-Floating Rate Non-Cumulative Preferred Stock, 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
5.700% Non-Cumulative Preferred Stock, 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
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
Common Class B, Voting
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)	9,192,047	9,180,744