Fair Value of Financial Instruments (Details) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Assets and liabilities measured at fair value
Derivative assets	$ 3,649	$ 337
CMBS \| Fair value measurements on recurring basis \| Total fair value
Assets and liabilities measured at fair value
Available-for-sale securities	187,707	275,155
CMBS \| Fair value measurements on recurring basis \| Level II
Assets and liabilities measured at fair value
Available-for-sale securities		275,155
CMBS \| Fair value measurements on recurring basis \| Level III
Assets and liabilities measured at fair value
Available-for-sale securities	187,707
RMBS \| Fair value measurements on recurring basis \| Total fair value
Assets and liabilities measured at fair value
Available-for-sale securities	164,393	122,525
RMBS \| Fair value measurements on recurring basis \| Level II
Assets and liabilities measured at fair value
Available-for-sale securities		122,525
RMBS \| Fair value measurements on recurring basis \| Level III
Assets and liabilities measured at fair value
Available-for-sale securities	164,393
Total available-for-sale equity securities \| Fair value measurements on recurring basis \| Total fair value
Assets and liabilities measured at fair value
Available-for-sale securities	9,985	8,177
Total available-for-sale equity securities \| Fair value measurements on recurring basis \| Level I
Assets and liabilities measured at fair value
Available-for-sale securities	9,985	8,177
Interest rate swaps \| Fair value measurements on recurring basis \| Total fair value
Assets and liabilities measured at fair value
Derivative assets		337
Derivative Liabilities	(12,765)	(2,017)
Interest rate swaps \| Fair value measurements on recurring basis \| Level II
Assets and liabilities measured at fair value
Derivative assets		337
Derivative Liabilities	(12,765)	(2,017)
Forward contracts \| Fair value measurements on recurring basis \| Total fair value
Assets and liabilities measured at fair value
Derivative assets	3,588
Derivative Liabilities	(8,297)	(7,383)
Forward contracts \| Fair value measurements on recurring basis \| Level II
Assets and liabilities measured at fair value
Derivative assets	3,588
Derivative Liabilities	(8,297)	(7,383)
Fair value measurements on recurring basis
Assets and liabilities measured at fair value
Total	473,329
Fair value measurements on recurring basis \| Total fair value
Assets and liabilities measured at fair value
Loan held-for-sale at fair value	121,229
Total Derivatives	(17,413)	(9,063)
Total	465,901	540,957
Fair value measurements on recurring basis \| Total fair value \| Available for sale securities
Assets and liabilities measured at fair value
Available-for-sale securities	483,314	550,020
Fair value measurements on recurring basis \| Total fair value \| Available-for-sale debt securities
Assets and liabilities measured at fair value
Available-for-sale securities	352,100	541,843
Fair value measurements on recurring basis \| Total fair value \| Loans held-for-sale at fair value
Assets and liabilities measured at fair value
Available-for-sale securities		144,163
Fair value measurements on recurring basis \| Total fair value \| Real estate industry
Assets and liabilities measured at fair value
Available-for-sale securities	9,985	8,177
Fair value measurements on recurring basis \| Total fair value \| Credit contracts
Assets and liabilities measured at fair value
Derivative assets	61
Fair value measurements on recurring basis \| Level I
Assets and liabilities measured at fair value
Total	9,985	8,177
Fair value measurements on recurring basis \| Level I \| Available for sale securities
Assets and liabilities measured at fair value
Available-for-sale securities	9,985	8,177
Fair value measurements on recurring basis \| Level I \| Real estate industry
Assets and liabilities measured at fair value
Available-for-sale securities	9,985	8,177
Fair value measurements on recurring basis \| Level II
Assets and liabilities measured at fair value
Total Derivatives	(17,413)	(9,063)
Total	(17,413)	388,617
Fair value measurements on recurring basis \| Level II \| Available for sale securities
Assets and liabilities measured at fair value
Available-for-sale securities		397,680
Fair value measurements on recurring basis \| Level II \| Available-for-sale debt securities
Assets and liabilities measured at fair value
Available-for-sale securities		397,680
Fair value measurements on recurring basis \| Level II \| Credit contracts
Assets and liabilities measured at fair value
Derivative assets	61
Fair value measurements on recurring basis \| Level III
Assets and liabilities measured at fair value
Loan held-for-sale at fair value	121,229
Total	473,329	144,163
Fair value measurements on recurring basis \| Level III \| Available for sale securities
Assets and liabilities measured at fair value
Available-for-sale securities	473,329	144,163
Fair value measurements on recurring basis \| Level III \| Available-for-sale debt securities
Assets and liabilities measured at fair value
Available-for-sale securities	352,100	144,163
Fair value measurements on recurring basis \| Level III \| Loans held-for-sale at fair value
Assets and liabilities measured at fair value
Available-for-sale securities		$ 144,163

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

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