CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Net interest income:
Interest income	$ 2,632,647		$ 2,918,562		$ 3,259,145
Interest expense	512,659		624,714		667,172
Net interest income	2,119,988		2,293,848		2,591,973
Other income (loss):
Realized gains (losses) on interest rate swaps	(825,360)	[1],[2]	(908,294)	[1],[2]	(893,769)	[1],[2]
Realized gains (losses) on termination of interest rate swaps	(779,333)		(101,862)		(2,385)
Unrealized gains (losses) on interest rate swaps	(948,755)		2,002,200		(32,219)
Subtotal	(2,553,448)		992,044		(928,373)
Investment advisory income	31,343		43,643		82,138
Net gains (losses) on disposal of investments	93,716		403,045		432,139
Net loss on extinguishment of 4% Convertible Senior Notes					(162,340)
Dividend income from affiliates	25,189		18,575		28,336
Net gains (losses) on trading assets	(245,495)		1,509		22,910
Net unrealized gains (losses) on interest-only Agency mortgage-backed securities	(86,172)		244,730		(59,937)
Impairment of goodwill			(23,987)
Loss on previously held equity interest in CreXus			(18,896)
Other income (loss)	(12,737)		15,481		525
Subtotal	(194,156)		684,100		343,771
Total other income (loss)	(2,747,604)		1,676,144		(584,602)
General and administrative expenses:
Compensation and management fee	155,560		167,366		190,702
Other general and administrative expenses	53,778		64,715		44,857
Total general and administrative expenses	209,338		232,081		235,559
Income (loss) before income taxes	(836,954)		3,737,911		1,771,812
Income taxes	5,325		8,213		35,912
Net income (loss)	(842,279)		3,729,698		1,735,900
Net income (loss) attributable to noncontrolling interest	(196)
Net income (loss)	(842,083)		3,729,698		1,735,900
Dividends on preferred stock	71,968		71,968		39,530
Net income (loss) available (related) to common stockholders	(914,051)		3,657,730		1,696,370
Net income (loss) per share available (related) to common stockholders:
Basic	$ (0.96)		$ 3.86		$ 1.74
Diluted	$ (0.96)		$ 3.74		$ 1.71
Weighted average number of common shares outstanding:
Basic	947,539,294		947,337,915		972,902,459
Diluted	947,539,294		995,557,026		1,005,755,057
Dividends declared per share of common stock	$ 1.2		$ 1.5		$ 2.05
Net income (loss)	(842,279)		3,729,698		1,735,900
Other comprehensive income (loss):
Unrealized gains (losses) on available-for-sale securities	3,048,291		(5,378,089)		482,765
Reclassification adjustment for net (gains) losses included in net income (loss)	(94,475)		(424,086)		(438,511)
Other comprehensive income (loss)	2,953,816		(5,802,175)		44,254
Comprehensive income (loss)	2,111,537		(2,072,477)		1,780,154
Comprehensive income (loss) attributable to noncontrolling interest	(196)
Comprehensive income (loss) attributable to Annaly	$ 2,111,733		$ (2,072,477)		$ 1,780,154

[1] Interest expense related to the Company's interest rate swaps is recorded in Realized losses on interest rate swaps on the Consolidated Statements of Operations and Comprehensive Income (Loss).

[2] Interest expense related to interest rate swaps is recorded in realized gains (losses) on interest rate swaps on the Consolidated Statements of Operations and Comprehensive Income (Loss).