CONSOLIDATED BALANCE SHEETS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Redeemable Preferred Stock [Member] Cumulative Redeemable Preferred Stock, Series E [Member]	Dec. 31, 2013 Redeemable Preferred Stock [Member] Cumulative Redeemable Preferred Stock, Series E [Member]
Assets
Residential mortgage investments ($13.44 and $13.12 billion pledged under repurchase arrangements at June 30, 2014 and December 31, 2013, respectively)	$ 13,711,400	$ 13,475,874
Cash collateral receivable from interest rate swap counterparties	45,591	25,502
Interest rate swap agreements at fair value	78	5,005
Cash and cash equivalents	500,900	413,356
Receivables and other assets	111,469	96,231
Total Assets	14,369,438	14,015,968
Liabilities
Repurchase arrangements and similar borrowings	12,786,858	12,482,900
Interest rate swap agreements at fair value	21,979	11,304
Unsecured borrowings	100,000	100,000
Common stock dividend payable	33,831	30,872
Accounts payable and accrued expenses	25,675	25,109
Total Liabilities	12,968,343	12,650,185
Stockholders' equity
Cumulative Preferred Stock			179,594	165,756
Common stock - $0.01 par value; 250,000 shares authorized: 95,767 and 95,807 shares issued and outstanding at June 30, 2014 and December 31, 2013, respectively	958	958
Paid-in capital	1,330,648	1,329,792
Accumulated deficit	(346,885)	(349,866)
Accumulated other comprehensive income	236,780	219,143
Stockholders' Equity Attributable to Parent	1,401,095	1,365,783
Total Liabilities and Equity	$ 14,369,438	$ 14,015,968