CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net interest income:
Interest income	[1]	$ 330,144,000	$ 321,715,000	$ 1,020,448,000	$ 925,282,000
Interest expense	[2]	188,551,000	174,671,000	589,611,000	485,189,000
Net interest income		141,593,000	147,044,000	430,837,000	440,093,000
Other-than-temporary impairments:
Total other-than-temporary impairment losses		0	(772,000)	(801,000)	(1,871,000)
Portion of loss recognized in other comprehensive income		0	(6,461,000)	(4,052,000)	(15,651,000)
Net other-than-temporary credit impairment losses		0	(7,233,000)	(4,853,000)	(17,522,000)
Other investment gains (losses):
Net unrealized gains (losses) on derivatives		31,620,000	71,197,000	(189,865,000)	178,511,000
Realized gains (losses) on terminations of interest rate swaps		(148,114,000)	0	(351,372,000)	0
Net realized gains (losses) on derivatives		(20,178,000)	2,881,000	(37,151,000)	14,573,000
Net gains (losses) on derivatives		(136,672,000)	74,078,000	(578,388,000)	193,084,000
Net unrealized gains (losses) on financial instruments at fair value		130,825,000	(34,306,000)	522,386,000	(38,204,000)
Net realized gains (losses) on sales of investments		1,596,000	(6,123,000)	2,673,000	(3,956,000)
Gains (losses) on extinguishment of debt		0	9,263,000	(608,000)	19,320,000
Total other gains (losses)		(4,251,000)	42,912,000	(53,937,000)	170,244,000
Other expenses:
Compensation and benefits		12,191,000	8,642,000	38,675,000	25,741,000
General and administrative expenses		6,528,000	5,576,000	18,569,000	16,351,000
Servicing fees		8,881,000	9,766,000	27,125,000	31,044,000
Transaction expenses		3,415,000	1,411,000	4,289,000	5,168,000
Total other expenses		31,015,000	25,395,000	88,658,000	78,304,000
Income (loss) before income taxes		106,327,000	157,328,000	283,389,000	514,511,000
Income taxes		1,000	7,000	156,000	76,000
Net income (loss)		106,326,000	157,321,000	283,233,000	514,435,000
Dividends on preferred stock		18,438,000	9,960,000	54,267,000	28,760,000
Net income (loss) available to common shareholders		$ 87,888,000	$ 147,361,000	$ 228,966,000	$ 485,675,000
Net income (loss) per share available to common shareholders:
Basic (usd per share)		$ 0.47	$ 0.79	$ 1.22	$ 2.59
Diluted (usd per share)		$ 0.47	$ 0.79	$ 1.22	$ 2.59
Weighted average number of common shares outstanding:
Basic (shares)		187,158,167	187,006,777	187,141,377	187,182,932
Diluted (shares)		188,440,171	187,584,958	188,331,109	187,705,831

[1] Includes interest income of consolidated VIEs of $192,622 and $223,948 for the quarters ended September 30, 2019 and 2018, respectively, and $600,436 and $688,720 for the nine months ended September 30, 2019 and 2018, respectively. See Note 8 to consolidated financial statements for further discussion.

[2] Includes interest expense of consolidated VIEs of $82,234 and $99,622 for the quarters ended September 30, 2019 and 2018, respectively, and $260,790 and $298,744 for the nine months ended September 30, 2019 and 2018, respectively. See Note 8 to consolidated financial statements for further discussion.