Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Cash flows from operating activities:
Net income	$ 13,900,000		$ 6,700,000		$ 7,500,000
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Net (gain) loss from sale of real estate	(2,700,000)		200,000		(400,000)
Acquisition related gain	(56,600,000)		(25,500,000)		(6,300,000)
Gain on sale of marketable securities			(4,300,000)
Depreciation and amortization	17,400,000		4,900,000		2,800,000
Provision for (benefit from) deferred income taxes	2,700,000		(500,000)		(4,700,000)
Amortization of deferred loan costs	2,200,000		1,200,000		800,000
Amortization of discount and accretion of premium on issuance of the senior notes payable	(1,200,000)		100,000
Equity in joint venture income	(29,800,000)		(21,500,000)		(12,500,000)
Accretion of interest income on loan pool participations and notes receivable	(12,400,000)		(8,100,000)		(6,700,000)
Stock compensation expense	7,500,000		8,100,000		5,100,000
Change in assets and liabilities:
Accounts receivable	(200,000)		(900,000)		(1,000,000)
Accounts receivable—related party	10,900,000		(6,800,000)		(9,000,000)
Operating distributions from joint ventures	56,100,000		40,400,000		13,000,000
Operating distributions from loan pool participation	11,600,000		18,600,000		2,400,000
Other assets	(1,400,000)		(3,100,000)		(3,800,000)
Accounts payable	200,000				200,000
Accrued expenses and other liabilities	1,200,000		1,400,000		12,100,000
Accrued salaries and benefits	11,900,000		5,800,000		3,900,000
Net cash provided by operating activities	31,300,000		16,700,000		3,400,000
Cash flows from investing activities:
Additions to notes receivable	(51,000,000)		(167,900,000)		(6,100,000)
Settlements of notes receivable	39,400,000		7,100,000		3,600,000
Additions to notes receivable—related party	(10,700,000)		(17,100,000)		(35,300,000)
Settlements of notes receivable—related party	6,600,000		9,100,000		4,900,000
Sale of participation interests	3,800,000
Sale of participation interests—related party	2,800,000
Capitalized development costs	(1,400,000)		0		0
Non refundable escrow deposits	(4,000,000)		0		0
Net proceeds from sale of real estate	10,100,000		18,700,000		7,100,000
Purchases of and additions to real estate	(168,500,000)		(119,000,000)		(2,700,000)
Investment in marketable securities	(3,700,000)		0		(32,800,000)
Short-term investments	(10,000,000)		10,000,000
Proceeds from sale of marketable securities			34,100,000
Investing distributions from joint ventures	81,500,000		38,700,000		23,300,000
Contributions to joint ventures	(322,700,000)		(178,600,000)		(105,400,000)
Investing distributions from loan pool participation	93,900,000		58,100,000		66,400,000
Contributions to loan pool participation	(34,900,000)		(72,900,000)		(130,500,000)
Net cash used in investing activities	(348,800,000)		(399,700,000)		(207,500,000)
Cash flow from financing activities:
Borrowings under senior notes payable			160,300,000		249,300,000
Repayment of notes payable					(24,800,000)
Borrowings under lines of credit	125,000,000		85,800,000		74,000,000
Repayment of lines of credit	(125,000,000)		(85,800,000)		(101,800,000)
Borrowings under mortgage loans payable	112,500,000		157,700,000		17,100,000
Repayment of mortgage loans payable	(1,700,000)				(37,600,000)
Debt issue costs	(2,200,000)		(7,300,000)		(7,700,000)
Issuance of common stock	275,900,000		106,200,000		123,100,000
Repurchase of common stock	(3,800,000)				(500,000)
Repurchase of warrants	(1,400,000)		(1,600,000)		(6,100,000)
Exercise of warrants	15,400,000		0		0
Dividends paid	(24,100,000)	[1]	(21,900,000)	[1]	(11,700,000)
Acquisition of noncontrolling interests			(500,000)
Contributions from noncontrolling interests	1,400,000		400,000		4,400,000
Distributions to noncontrolling interests	(600,000)		(4,900,000)		(5,100,000)
Net cash provided by financing activities	371,400,000		388,400,000		272,600,000
Effect of currency exchange rate changes on cash and cash equivalents	3,400,000		(400,000)		500,000
Net change in cash and cash equivalents	57,300,000		5,000,000		69,000,000
Cash and cash equivalents, beginning of year	120,900,000		115,900,000		46,900,000
Cash and cash equivalents, end of year	178,200,000		120,900,000		115,900,000
Supplemental disclosure of non-cash investing and financing activities:
Unrealized gain (loss) on marketable securities, net of tax	0		3,300,000		(3,200,000)
Supplemental cash flow information:
Interest	49,700,000	[2]	28,700,000	[2]	17,000,000	[2]
Income taxes	2,300,000		100,000		0
Cash paid for interest	800,000		2,300,000		2,700,000
Sale of condo unit with seller back financing [Member]
Supplemental disclosure of non-cash investing and financing activities:
Sale of condo unit with seller back financing			1,200,000
Acquisitions of property by assumption of mortgage loan and note payable [Member]
Supplemental disclosure of non-cash investing and financing activities:
Acquisitions of property			33,800,000
Acquisition of properties in lieu of settlement of notes receivable and interest receivable [Member]
Supplemental disclosure of non-cash investing and financing activities:
Acquisitions of property			$ 36,900,000

[1] The difference between declared and paid is the amount accrued on the consolidated balance sheets.

[2] Cash paid for interest includes capitalized interest of $0.8 million, $2.3 million, and $2.7 million for the years ended December 31, 2013, 2012, and 2011.