CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net income	$ 44,640	$ 89,936	$ 53,715
Other Comprehensive income (loss):
Unrealized gain (loss) on valuation of swap agreements	3,610	(3,519)	(5,611)
Reclassification of realized interest on swap agreements	2,892	2,268	3,081
Other comprehensive income (loss)	6,502	(1,251)	(2,530)
Comprehensive income	51,142	88,685	51,185
Comprehensive income attributable to noncontrolling interests	(5,588)	(49,373)	(686)
Comprehensive income attributable to Common Shareholders	$ 45,554	$ 39,312	$ 50,499