Debt Obligations, net (Encumbered/Unencumbered Assets) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Debt Instrument [Line Items]
Real estate, net	$ 2,741,390		$ 2,796,181
Real estate available and held for sale	354,814		360,517
Loans receivable and other lending investments, net(1)	1,456,407	[1]	1,370,109	[1]
Other investments	241,561		207,209
Cash and other assets	679,313		907,995
Total assets	5,473,485		5,642,011
Financing receivable, allowance for credit losses, collectively evaluated for impairment	30,600	[2]	29,200	[2]
Encumbered Assets
Debt Instrument [Line Items]
Real estate, net	609,121		1,644,463
Real estate available and held for sale	28,705		152,604
Loans receivable and other lending investments, net(1)	48,820	[3]	860,557	[3]
Other investments	20,369		24,093
Cash and other assets	0		0
Total assets	707,015		2,681,717
Unencumbered Assets
Debt Instrument [Line Items]
Real estate, net	2,132,269		1,151,718
Real estate available and held for sale	326,109		207,913
Loans receivable and other lending investments, net(1)	1,438,187	[3]	538,752	[3]
Other investments	221,192		183,116
Cash and other assets	679,313		907,995
Total assets	$ 4,797,070		$ 2,989,494

[1] The Company's recorded investment in loans as of June 30, 2014 and December 31, 2013 also includes accrued interest of $7.7 million and $6.5 million, respectively, which are included in "Accrued interest and operating lease income receivable, net" on the Company's Consolidated Balance Sheets.

[2] The carrying value of these loans include unamortized discounts, premiums, deferred fees and costs aggregating to a net discount of $8.3 million and $4.6 million as of June 30, 2014 and December 31, 2013, respectively.

[3] As of June 30, 2014 and December 31, 2013, the amounts presented exclude general reserves for loan losses of $30.6 million and $29.2 million, respectively.