Derivative Instruments (Tables)

6 Months Ended

Jun. 30, 2011

Derivative Instruments

Schedule of Outstanding Derivative Instruments

Notional Amount												Fair Value at Significant Other Observable Inputs (Level 2)
As of June 30, 2011			As of December 31, 2010			Type of Derivative		Strike Rate		Effective Date	Expiration Date	As of June 30, 2011			As of December 31, 2010
$	—		$	19,515	(1)		Swap		4.944	Jul. 10, 2006	Apr. 10, 2011	$	—		$	(231	)
	68,747	(1)		66,858	(1)		Swap		2.980	April 6, 2009	Nov. 30, 2013		(2,606	)		(2,471	)
	15,024	(2)		13,978	(2)		Swap		3.981	May 17, 2006	Jul. 18, 2013		(593	)		(828	)
	10,870	(2)		10,113	(2)		Swap		4.070	Jun. 23, 2006	Jul. 18, 2013		(448	)		(621	)
	9,566	(2)		8,900	(2)		Swap		3.989	Jul. 27, 2006	Oct. 18, 2013		(412	)		(557	)
	44,534	(2)		41,430	(2)		Swap		3.776	Dec. 5, 2006	Jan. 18, 2012		(516	)		(1,129	)
	38,289	(2)		35,620	(2)		Swap		4.000	Dec. 20, 2006	Jan. 18, 2012		(491	)		(1,054	)
	43,506	(2)		40,152	(2)		Swap		2.703	Dec. 3, 2009	Sep. 4, 2014		(630	)		(1,139	)
	16,576			16,976			Cap		4.000	June 24, 2009	June 25, 2012		—			3
	20,500			20,500			Cap		4.000	Aug. 4, 2010	June 15, 2013		4			30
$	267,612		$	274,042								$	(5,692	)	$	(7,997	)

(1) Translation to U.S. dollars is based on exchange rate of $1.61 to £1.00 as of June 30, 2011 and $1.56 to £1.00 as of December 31, 2010.

(2) Translation to U.S. dollars is based on exchange rate of $1.45 to €1.00 as of June 30, 2011 and $1.34 to €1.00 as of December 31, 2010.