CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Agency MBS pledged to counterparties at fair value	$ 3,105,638,000	$ 3,548,719,000
Series B Cumulative Convertible Preferred Stock, par value	$ 0.01	$ 0.01
Series B Cumulative Convertible Preferred Stock, liquidating preference per share	$ 25.00	$ 25.00
Series B Cumulative Convertible Preferred Stock, liquidating preference	$ 19,494,000	$ 19,494,000
Series B Cumulative Convertible Preferred Stock, shares issued	779,743	780,000
Series B Cumulative Convertible Preferred Stock, shares outstanding	779,743	780,000
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, authorized	200,000,000	200,000,000
Common Stock, issued	98,767,675	98,483,000
Common Stock, outstanding	98,767,675	98,483,000
Total assets	$ 4,581,761,000	$ 5,039,700,000
Accrued interest receivable	16,386,000	16,872,000
Total liabilities	4,027,669,000	4,458,595,000
Accrued interest payable	14,722,000	24,828,000
Agency MBS
Agency MBS pledged to counterparties at fair value	2,992,673,000	3,433,252,000
Non-Agency MBS
Agency MBS pledged to counterparties at fair value	$ 593,748,000	$ 726,428,000
Series A Preferred Stock
Cumulative Preferred Stock, par value	$ 0.01	$ 0.01
Cumulative Preferred Stock, liquidating preference per share	$ 25.00	$ 25.00
Cumulative Preferred Stock, liquidating preference	$ 47,984,000	$ 47,984,000
Cumulative Preferred Stock, shares issued	1,919,378	1,919,000
Cumulative Preferred Stock, shares outstanding	1,919,378	1,919,000
Series C Preferred Stock
Cumulative Preferred Stock, par value	$ 0.01	$ 0.01
Cumulative Preferred Stock, liquidating preference per share	$ 25.00	$ 25.00
Cumulative Preferred Stock, liquidating preference	$ 50,257,000	$ 50,257,000
Cumulative Preferred Stock, shares issued	2,010,278	2,010,000
Cumulative Preferred Stock, shares outstanding	2,010,278	2,010,000
Variable Interest Entities Primary Beneficiary
Total assets	$ 485,000,000	$ 551,000,000
Accrued interest receivable	1,600,000	1,800,000
Total liabilities	476,000,000	541,000,000
Accrued interest payable	$ 1,600,000	$ 1,700,000