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Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2012 | Mar. 31, 2011
Net income (loss) | $ 6,977 | $ (18,566)
Other comprehensive income |  |
Unrealized losses on interest rate derivatives | (1,987) | (136)
Losses on interest rate derivatives included in net income | 1,474 | 1,104
Other comprehensive (loss) income | (513) | 968
Comprehensive income (loss) | 6,464 | (17,598)
Comprehensive (income) loss attributable to noncontrolling interests | (271) | 714
Comprehensive income (loss) attributable to COPT | $ 6,193 | $ (16,884)

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