Consolidated Statements of Cash Flows - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Cash Flows From Operating Activities
Net income		$ 28,729	$ 21,228
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Realized (gain) loss on RMBS, available-for-sale, net	[1]	13,222	(2,094)
Unrealized gain on investments in Servicing Related Assets		(21,731)	(22,464)
Realized gain on acquired assets, net		(12)	(5)
Realized loss on derivatives, net		10,638	540
Unrealized (gain) loss on derivatives, net		(24,456)	8,059
Amortization of premiums on RMBS, available-for-sale		1,209	4,995
Amortization of deferred financing costs		0	50
LTIP-OP Unit awards		173	241
Changes in:
Receivables and other assets, net		4,882	1,180
Due to affiliates		1,742	903
Accrued expenses and other liabilities, net		(633)	49
Net cash provided by operating activities		13,763	12,682
Cash Flows From Investing Activities
Purchase of RMBS		(211,463)	(22,045)
Principal paydown of RMBS		35,054	81,483
Proceeds from sale of RMBS		250,026	144,863
Acquisition of MSRs		(5,645)	(20,295)
Payments for settlement of derivatives		(10,362)	(1,700)
Net cash provided by investing activities		57,610	182,306
Cash Flows From Financing Activities
Borrowings under repurchase agreements		1,496,531	1,502,670
Repayments of repurchase agreements		(1,597,140)	(1,718,647)
Proceeds from derivative financing		21,390	(2,974)
Proceeds from bank loans		13,800	5,500
Dividends paid		(7,391)	(7,063)
LTIP-OP Units distributions paid		(91)	(85)
Conversion of OP units		0	(147)
Issuance of common stock, net of offering costs		4,104	200
Net cash used in financing activities		(68,797)	(220,546)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash		2,576	(25,558)
Cash, Cash Equivalents and Restricted Cash, Beginning of Period		76,777	130,218	$ 130,218
Cash, Cash Equivalents and Restricted Cash, End of Period		79,353	104,660	$ 76,777
Supplemental Disclosure of Cash Flow Information
Cash paid during the period for interest expense		918	172
Cash paid during the period for income taxes		2	6
Supplemental Schedule of Non-Cash Investing and Financing Activities
Dividends declared but not paid		7,210	6,736
Sale of RMBS, settled after period end		(46,801)	(16,702)
Purchase of RMBS, settled after period end		$ 0	$ 29,250

[1] Reclassified from accumulated other comprehensive income into earnings.