Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income	$ 15,923	$ 18,350
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	4,415	3,365
Straight-line rental income	(1,283)	(1,062)
Loan and realty losses (recoveries)	(4,037)	0
Share-based compensation	1,580	1,432
Income from unconsolidated entity	(22)	0
Change in operating assets and liabilities:
Deferred costs and other assets	(324)	(133)
Accounts payable and accrued expenses	(440)	(665)
Deferred income	(40)	(40)
Net cash provided by operating activities	23,846	21,247
Cash flows from investing activities:
Investment in mortgage notes receivable	0	(52)
Collection of mortgage notes receivable	154	871
Investment in real estate development	1,463	4,881
Investment in renovations of existing real estate	836	0
Net cash used in investing activities	(2,145)	(4,062)
Cash flows from financing activities:
Net change in borrowings under a revolving credit facility	0	(2,000)
Stock options exercised	(146)	0
Distributions to noncontrolling interest	(176)	0
Dividends paid to stockholders	(24,793)	(24,144)
Net cash provided by (used in) financing activities	(24,823)	(26,144)
(Decrease) increase in cash and cash equivalents	(3,122)	(8,959)
Cash and cash equivalents, beginning of year	9,172	15,886
Cash and cash equivalents, end of year	6,050	6,927
Supplemental disclosure of cash flow information:
Interest Paid	1,070	534
Supplemental schedule of non-cash investing and financing activities:
Decrease in fair value of cash flow hedge	$ 270	$ 0