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Note 5 - Net Trading - Net Trading (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net realized gains / (losses)- trading inventory	$ 21,103	$ 31,269	$ 24,118
Net unrealized gains / (losses)-trading inventory	(3,069)	2,076	(1,320)
Gains and losses	18,034	33,345	22,798
Interest income-trading inventory	5,958	7,759	6,921
Interest income - RTLs	0	0	236
Interest income-receivables under resale agreements	94,123	98,710	176,336
Interest income	100,081	106,469	183,493
Interest expense-securities sold under agreement to repurchase	(48,024)	(65,030)	(164,851)
Interest expense-LegacyTexas Credit Facility	0	(39)	(100)
Interest expense-margin payable	(706)	(1,134)	(3,168)
Interest expense	(48,730)	(66,203)	(168,119)
Net trading	$ 69,385	$ 73,611	$ 38,172

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