Condensed Consolidated Statements of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash Flows from Operating Activities:
Net Income	$ 79,540	$ 40,953
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Amortization of deferred financing costs	2,390	336
Amortization of net discount on mortgage backed securities (MBS)	(12,452)	(4,418)
Amortization of net deferred loan fees and discounts	(18,461)	(3,606)
Amortization of premium from collateralized debt obligations	(665)
Stock-based compensation	10,432	4,685
Incentive-fee compensation	1,206
Gain on sale of available-for-sale securities	(10,278)	(760)
Gain on sale of loans	(10,337)	(9,253)
Gain on sale of other investments	(27)
Unrealized losses on loans held for sale at fair value	1,725
Unrealized losses on interest rate hedges	11,099
Unrealized gains on credit spread hedges	(161)
Unrealized (gains) losses on currency hedges	(2,674)	9,020
Unrealized foreign currency remeasurement loss (gain)	4,245	(7,702)
OTTI	2,621
Changes in operating assets and liabilities:
Related-party payable	2,704	1,666
Accrued interest receivable, less purchased interest	(8,034)	(5,465)
Receivable for securities sold		(9,828)
Other assets	(6,293)	(186)
Accounts payable and accrued expenses	(345)	1,546
Other liabilities	732	(2,685)
Origination of held for sale loans	(270,066)
Proceeds from sale of held for sale loans	294,149
Net cash provided by operating activities	71,050	14,303
Cash Flows from Investing Activities:
Purchase of mortgage-backed securities	(187,133)	(140,472)
Proceeds from sale of mortgage-backed securities	283,778	25,368
Proceeds from mortgage-backed securities maturities	11,765
Mortgage-backed securities principal paydowns	94,827	22,921
Purchase of loans held for investment	(1,018,480)	(801,586)
Loan maturities	264,615	114,717
Proceeds from sale of loans held for investment	5,000	38,164
Loan investment repayments	13,092	10,008
Purchased interest on investments	(915)	(2,789)
Investments in other investments	(37,088)	(15,028)
Proceeds from other investment repayments	235
Proceeds from sale of other investments	2,844
Net cash used in investing activities	(567,460)	(748,697)
Cash Flows from Financing Activities:
Borrowings from secured financing arrangements	1,016,488	283,960
Principal repayments on borrowings	(991,812)	(2,623)
Proceeds from collateralized debt obligations		54,305
Payment of deferred financing costs	(2,192)	(2,885)
Proceeds from common stock offering	476,740
Payment of underwriting and offering costs	(28,287)
Treasury stock purchased	(5,981)
Payment of dividends	(101,298)	(28,203)
Contribution from noncontrolling interest owners		2,580
Distribution to noncontrolling interest owners	(9,267)	(896)
Net cash provided by financing activities	354,391	306,238
Net decrease in cash and cash equivalents	(142,019)	(428,156)
Cash and cash equivalents, beginning of period	226,854	645,129
Cash and cash equivalents, end of period	84,835	216,973
Supplemental disclosure of cash flow information:
Cash paid for interest	19,475	9,213
Income taxes paid	1,074	208
Supplemental disclosure of non-cash investing and financing activity:
Dividends declared, not yet paid	41,556	16,047
Unsettled securities purchased		209
Transfer of CMBS from held-to-maturity to available-for-sale		$ 259,828