Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands									3 Months Ended								12 Months Ended
	Dec. 14, 2020	Sep. 16, 2020	Jun. 15, 2020	Mar. 11, 2020	Dec. 11, 2019	Sep. 10, 2019	Jun. 11, 2019	Mar. 12, 2019	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Data (Unaudited)
Net interest income after provision for loan losses									$ 23,749	$ 21,482	$ 20,394	$ (17,183)
Net interest income after provision for loan losses													$ 22,319	$ 19,640	$ 19,933	$ 12,460	$ 48,429	$ 74,352	$ 58,560
Non-interest income									83,406	107,906	120,927	22,523
Non-interest income													45,422	39,984	32,956	56,266	334,757	174,628	147,923
Non-interest expense									75,328	87,471	101,158	64,793
Non-interest expense													(48,755)	(49,842)	(44,600)	(41,279)	(328,733)	(184,476)	(143,640)
Net income (loss)									27,559	35,363	34,663	(51,516)	20,934	12,427	11,245	30,450	46,069	75,056	61,457
Net income attributable to Ready Capital Corporation									$ 26,911	$ 34,558	$ 33,853	$ (50,452)	$ 20,428	$ 12,104	$ 10,969	$ 29,467	$ 44,870	$ 72,968	$ 59,258
Earnings (loss) per common share - basic									$ 0.49	$ 0.63	$ 0.62	$ (0.98)	$ 0.43	$ 0.27	$ 0.25	$ 0.90	$ 0.81	$ 1.72	$ 1.84
Earnings (loss) per common share - diluted									0.49	0.63	0.62	(0.98)	0.43	0.27	0.25	0.90	0.81	1.72	1.84
Dividends declared per share of common stock	$ 0.35	$ 0.30	$ 0.25	$ 0.40	$ 0.40	$ 0.40	$ 0.40	$ 0.40	$ 0.35	$ 0.30	$ 0.25	$ 0.40	$ 0.40	$ 0.40	$ 0.40	$ 0.40	$ 1.30	$ 1.60	$ 1.57