Net (Loss) Income Available to Common Unitholders Per Unit of the Operating Partnership (Tables)

6 Months Ended

Jun. 30, 2011

Net Income Available To Common Unitholders [Line Items]

Net (loss) income available to common stockholders

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2011			2010			2011			2010
	(in thousands, except share and per share amounts)
Numerator:
Net income attributable to Kilroy Realty Corporation	$	3,482		$	2,016		$	8,315		$	10,701
Preferred distributions and dividends		(3,799	)		(3,799	)		(7,598	)		(7,598	)
Net (loss) income available to common stockholders		(317	)		(1,783	)		717			3,103
Allocation to participating securities (nonvested shares and RSUs)		(327	)		(305	)		(649	)		(604	)
Numerator for basic and diluted net (loss) income available to common stockholders	$	(644	)	$	(2,088	)	$	68		$	2,499
Denominator:
Basic weighted average vested shares outstanding		57,685,710			50,296,643			55,008,765			46,674,494
Effect of dilutive securities- Exchangeable Notes and stock options		—			—			375,964			3,356
Diluted weighted average vested shares and common share equivalents outstanding		57,685,710			50,296,643			55,384,729			46,677,850
Basic earnings per share:
Net (loss) income available to common stockholders per share	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05
Diluted earnings per share:
Net (loss) income available to common stockholders per share	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05

Operating Partnership [Member]

Net Income Available To Common Unitholders [Line Items]

Net (loss) income available to common stockholders

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2011			2010			2011			2010
	(in thousands, except unit and per unit amounts)
Numerator:
Net income attributable to Kilroy Realty, L.P.	$	3,440		$	1,905		$	8,274		$	10,737
Preferred distributions		(3,799	)		(3,799	)		(7,598	)		(7,598	)
Net (loss) income available to common unitholders		(359	)		(1,894	)		676			3,139
Allocation to participating securities (nonvested units and RSUs)		(327	)		(305	)		(649	)		(604	)
Numerator for basic and diluted net (loss) income available to common unitholders	$	(686	)	$	(2,199	)	$	27		$	2,535
Denominator:
Basic weighted average vested units outstanding		59,407,687			52,019,774			56,731,316			48,397,625
Effect of dilutive securities-Exchangeable Notes and stock options		—			—			375,964			3,356
Diluted weighted average vested units and common unit equivalents outstanding		59,407,687			52,019,774			57,107,280			48,400,981
Basic earnings per unit:
Net (loss) income available to common unitholders per unit	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05
Diluted earnings per unit:
Net (loss) income available to common unitholders per unit	$	(0.01	)	$	(0.04	)	$	0.00		$	0.05