Related Party Transactions - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended
	Nov. 05, 2014	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Aug. 31, 2014	Aug. 07, 2014
Compensation and management fee		$ 38,709,000	$ 37,450,000	$ 111,754,000	$ 113,093,000
Chimera
Advisory fees from affiliate		0	3,800,000	$ 0	24,800,000
Effective date				Aug. 08, 2014
Management fee percentage							1.20%	0.75%
Amendment Agreement
Basis for management fee				Amount equal to 1/12th of 1.05% of stockholders' equity
Term of management agreement expiration date	Dec. 31, 2016
Renewal term	2 years
Management agreement, termination, description				At least two-thirds of the Company's independent directors or the holders of a majority of the Company's outstanding shares of common stock elect to terminate the agreement in their sole discretion for any or no reason.
Amendment Agreement | Minimum
Management agreement, required period to terminate from the date of the notice	1 year
Management Agreement
Compensation and management fee		38,700,000	$ 37,500,000	$ 113,100,000	$ 111,800,000
Management fee payable		$ 12,700,000		$ 12,700,000		$ 12,100,000