Related Party Transactions - Additional Information (Detail) - USD ($)			3 Months Ended		6 Months Ended
	Aug. 05, 2015	Nov. 05, 2014	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Aug. 31, 2014	Aug. 07, 2014
Shares repurchased, shares					11,132,226
Shares repurchased, value					$ 102,700,000
Compensation and management fee			$ 36,048,000	$ 37,014,000	$ 73,045,000	$ 75,643,000
Amendment Agreement
Basis for management fee		Amount equal to 1/12th of 1.05% of stockholders' equity
Management Agreement, term		2 years
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
Chimera
Shares repurchased, shares	9,000,000
Shares repurchased, value	$ 126,400,000
Share repurchase agreement expiration period	2015-08
Advisory fees from affiliate			0	10,600,000	$ 0	21,100,000
Effective date					Aug. 08, 2014
Management fee percentage								1.20%	0.75%
Management Agreement
Compensation and management fee			36,000,000	$ 37,000,000	$ 75,600,000	$ 73,000,000
Management fee payable			$ 11,900,000		$ 11,900,000		$ 12,100,000