Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2017

Stockholders' Equity Note [Abstract]

Schedule of cash dividends declared on Series B preferred stock

The following table presents cash dividends declared by the Company on its Series B Preferred Stock from January 1, 2015 through December 31, 2017:

Year	Declaration Date	Record Date	Payment Date	Dividend Per Share
2017	November 17, 2017	December 1, 2017	December 29, 2017	$0.46875
	August 10, 2017	September 1, 2017	September 29, 2017	0.46875
	May 16, 2017	June 2, 2017	June 30, 2017	0.46875
	February 17, 2017	March 6, 2017	March 31, 2017	0.46875
2016	November 22, 2016	December 6, 2016	December 30, 2016	$0.46875
	August 12, 2016	September 2, 2016	September 30, 2016	0.46875
	May 18, 2016	June 3, 2016	June 30, 2016	0.46875
	February 12, 2016	February 29, 2016	March 31, 2016	0.46875
2015	November 19, 2015	December 3, 2015	December 31, 2015	$0.46875
	August 24, 2015	September 9, 2015	September 30, 2015	0.46875
	May 18, 2015	June 2, 2015	June 30, 2015	0.46875
	February 13, 2015	February 27, 2015	March 31, 2015	0.46875

Schedule of cash dividends declared on common stock

The following table presents cash dividends declared by the Company on its common stock from January 1, 2015 through December 31, 2017:

Year	Declaration Date	Record Date	Payment Date	Dividend Per Share
2017	December 13, 2017	December 28, 2017	January 31, 2018	$0.20	(1)
	September 14, 2017	September 28, 2017	October 31, 2017	0.20
	June 12, 2017	June 29, 2017	July 28, 2017	0.20
	March 8, 2017	March 29, 2017	April 28, 2017	0.20
2016	December 14, 2016	December 28, 2016	January 31, 2017	$0.20
	September 15, 2016	September 28, 2016	October 31, 2016	0.20
	June 14, 2016	June 28, 2016	July 29, 2016	0.20
	March 11, 2016	March 28, 2016	April 29, 2016	0.20
2015	December 9, 2015	December 28, 2015	January 29, 2016	$0.20
	September 17, 2015	September 29, 2015	October 30, 2015	0.20
	June 15, 2015	June 29, 2015	July 31, 2015	0.20
	March 13, 2015	March 27, 2015	April 30, 2015	0.20

(1)  At December 31, 2017, the Company had accrued dividends and dividend equivalents payable of $79.8 million related to the common stock dividend declared on December 13, 2017.

Public Offering of Common Stock

Share Issue Date	Shares Issued	Gross Proceeds Per Share		Gross Proceeds (1)
(In Thousands, Except Per Share Amounts)
May 10, 2017	23,000	$	7.85	$	180,550	(1)

(1) The Company incurred approximately $2.3 million of underwriting discounts and related expenses in connection with this equity offering.

Schedule of changes in balances in each component of the entity's AOCI

The following table presents changes in the balances of each component of the Company’s AOCI for the years ended December 31, 2017, 2016 and 2015:

	For the Year Ended December 31,
	2017									2016									2015
(In Thousands)	Net Unrealized Gain/(Loss) on AFS Securities			Net  Unrealized Gain/(Loss) on Swaps			Total  AOCI			Net  Unrealized Gain/(Loss) on AFS Securities			Net  Unrealized Gain/(Loss) on Swaps			Total  AOCI			Net  Unrealized Gain/(Loss) on AFS Securities			Net  Unrealized Gain/(Loss) on Swaps			Total  AOCI
Balance at beginning of period	$	620,403		$	(46,721	)	$	573,682		$	585,250		$	(69,399	)	$	515,851		$	813,515		$	(59,062	)	$	754,453
OCI before reclassifications	39,984			35,297			75,281			72,560			22,678			95,238			(194,890		)	(10,337		)	(205,227		)
Amounts reclassified from   AOCI (1)	(39,739		)	—			(39,739		)	(37,407		)	—			(37,407		)	(37,912		)	—			(37,912		)
Cumulative effect adjustment on adoption of revised accounting standard for repurchase agreement financing	—			—			—			—			—			—			4,537			—			4,537
Net OCI during period (2)	245			35,297			35,542			35,153			22,678			57,831			(228,265		)	(10,337		)	(238,602		)
Balance at end of period	$	620,648		$	(11,424	)	$	609,224		$	620,403		$	(46,721	)	$	573,682		$	585,250		$	(69,399	)	$	515,851

(1)  See separate table below for details about these reclassifications.

(2)  For further information regarding changes in OCI, see the Company’s consolidated statements of comprehensive income/(loss).

Information about the significant amounts reclassified out of the entity's AOCI

The following table presents information about the significant amounts reclassified out of the Company’s AOCI for the years ended December 31, 2017, 2016, and 2015:

	For the Year Ended December 31,
	2017			2016			2015
Details about AOCI Components	Amounts Reclassified from AOCI									Affected Line Item in the Statement Where Net Income is Presented
(In Thousands)
AFS Securities:
Realized gain on sale of securities	$	(38,707	)	$	(36,922	)	$	(37,207	)	Net gain on sales of MBS and U.S. Treasury securities
OTTI recognized in earnings	(1,032		)	(485		)	(705		)	Net impairment losses recognized in earnings
Total AFS Securities	$	(39,739	)	$	(37,407	)	$	(37,912	)
Total reclassifications for period	$	(39,739	)	$	(37,407	)	$	(37,912	)