Debt and Preferred Equity Investments (Details 2) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014		Dec. 31, 2013
Preferred equity investment
Aggregate weighted average current yield (as a percent)	10.69%
Debt and preferred equity investments	$ 1,547,808		$ 1,304,839
Preferred equity investments
Preferred equity investment
Aggregate weighted average current yield (as a percent)	9.75%
Senior Financing	1,521,260
Debt and preferred equity investments	352,136	[1]	369,364	[1]
Preferred equity with initial mandatory redemption in July 2015
Preferred equity investment
Senior Financing	525,000	[2]
Debt and preferred equity investments	119,197	[1],[2]	115,198	[1],[2]
Preferred equity with initial mandatory redemption in July, 2016
Preferred equity investment
Senior Financing	926,260	[2]
Debt and preferred equity investments	222,992	[1],[2]	218,330	[1],[2]
Preferred equity with initial mandatory redemption in November 2017
Preferred equity investment
Senior Financing	70,000
Debt and preferred equity investments	9,947	[1]	9,940	[1]
Preferred equity redeemed in April 2014
Preferred equity investment
Senior Financing	0	[3]
Debt and preferred equity investments	$ 0	[1],[3]	$ 25,896	[1],[3]

[1] Carrying value is net of discounts and deferred origination fees.

[2] The difference between the pay and accrual rates is included as an addition to the principal balance outstanding.

[3] This preferred equity investment was redeemed in April 2014.