NET INCOME (LOSS) PER COMMON SHARE (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Schedule of Net Income (Loss) Per Share Reconciliation

The following table presents a reconciliation of net income (loss) and shares used in calculating basic and diluted net income (loss) per share for the years ended December 31, 2018, 2017 and 2016.

	For the Years Ended
	December 31, 2018			December 31, 2017			December 31, 2016
	(dollars in thousands, except per share data)
Net income (loss)	$	54,148		$	1,569,016		$	1,432,786
Net income (loss) attributable to noncontrolling interests	(260		)	(588		)	(970		)
Net income (loss) attributable to Annaly	54,408			1,569,604			1,433,756
Dividends on preferred stock	129,312			109,635			82,260
Net income (loss) available (related) to common stockholders	$	(74,904	)	$	1,459,969		$	1,351,496
Weighted average shares of common stock outstanding-basic	1,209,601,809			1,065,923,652			969,787,583
Add: Effect of stock awards, if dilutive	—			427,964			314,770
Weighted average shares of common  stock outstanding-diluted	1,209,601,809			1,066,351,616			970,102,353
Net income (loss) per share available (related) to common share
Basic	$	(0.06	)	$	1.37		$	1.39
Diluted	$	(0.06	)	$	1.37		$	1.39