Consolidated Statements of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Operating activities:
Net income	$ 23,874	$ 12,804
Adjustments to reconcile net income to cash provided by operating activities:
Increase in accrued interest receivable	(5,275)	(460)
Increase (decrease) in accrued interest payable	358	(63)
Provision for loan losses	450	559
Gain on sale of investments, net	(742)	(794)
Fair value adjustments, net	(5)	(153)
Amortization and depreciation	11,427	3,197
Stock-based compensation expense	353	163
Net change in other assets and other liabilities	2,840	(2,245)
Net cash and cash equivalents provided by operating activities	33,280	13,008
Investing activities:
Purchase of investments	(1,244,687)	(219,279)
Principal payments received on investments	207,014	145,274
(Increase) decrease in principal receivable on investments	(10,663)	953
Proceeds from sales of investments	35,351	50,883
Principal payments received on securitized mortgage loans	21,417	19,443
Other investing activities	(204)	(97)
Net cash and cash equivalents used in investing activities	(991,772)	(2,823)
Financing activities:
Borrowings under (repayment of) repurchase agreements, net	899,066	(47,404)
Borrowings under non-recourse collateralized financing	0	50,678
Principal payments on non-recourse collateralized financing	(1,600)	(15,544)
Proceeds from issuance of common stock	95,242	10,859
Dividends paid	(19,077)	(8,668)
Net cash and cash equivalents provided by (used in) financing activities	973,631	(10,079)
Net increase in cash and cash equivalents	15,139	106
Cash and cash equivalents at beginning of period	18,836	30,173
Cash and cash equivalents at end of period	33,975	30,279
Supplemental Disclosure of Cash Activities:
Cash paid for interest	$ 9,881	$ 8,269