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CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Rental income $ 50,273 $ 42,107 $ 100,728 $ 81,335
Expenses:        
Real estate taxes 5,949 4,637 11,482 9,094
Utility expenses 3,870 3,540 7,705 7,047
Other operating expenses 9,325 7,260 18,178 14,181
Depreciation and amortization 12,153 9,097 24,225 17,483
Acquisition related costs 245 1,009 294 1,838
General and administrative 2,719 2,566 5,758 4,909
Total expenses 34,261 28,109 67,642 54,552
Operating income 16,012 13,998 33,086 26,783
Interest and other income 6 20 14 35
Interest expense (including net amortization of debt premiums and deferred financing fees of $335, $262, $659 and $521, respectively) (4,096) (3,076) (8,119) (5,613)
Equity in earnings of an investee 76 46 121 83
Income before income tax expense 11,998 10,988 25,102 21,288
Income tax expense (44) (56) (89) (102)
Net income 11,954 10,932 25,013 21,186
Other comprehensive income (loss):        
Equity in unrealized gain (loss) of an investee (1) 39 (4) 43
Other comprehensive income (loss) (1) 39 (4) 43
Comprehensive income $ 11,953 $ 10,971 $ 25,009 $ 21,229
Weighted average common shares outstanding 47,098 40,506 47,075 40,503
Net income per common share (in dollars per share) $ 0.25 $ 0.27 $ 0.53 $ 0.52