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Business Combinations (Pro Forma Impact Of Real Estate Joint Ventures) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Business Combinations [Abstract]    
Revenues $ 122,471 [1] $ 118,993 [1]
Net income 22,638 [1] 17,177 [1]
Net income attributable to common shareholders $ 12,328 [1] $ 7,216 [1]
Earnings per share - basic $ 0.10 [1] $ 0.06 [1]
Earnings per share - diluted $ 0.10 [1] $ 0.06 [1]
[1] There are no non-recurring pro forma adjustments included within or excluded from the amounts in the preceding table.