Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Significant Accounting Policies [Abstract]

Computation of basic and diluted earning per share

	Years Ended December 31,
	2011			2010			2009
Numerator for earnings per share — basic and diluted:
Net income/(loss) attributable to common stockholders	$	10,537		$	(112,362	)	$	(95,858	)
Denominator for earnings per share — basic and diluted:
Weighted average common shares outstanding		202,573			167,365			150,067
Non-vested restricted stock awards		(1,279	)		(1,508	)		(977	)
Denominator for basic and diluted earnings per share		201,294			165,857			149,090
Net income/(loss) attributable to common stockholders — basic and diluted	$	0.05		$	(0.68	)	$	(0.64	)