Derivative Instruments (Tables)

6 Months Ended

Jun. 30, 2011

Derivative Instruments (Tables) [Abstract]

Fair value of derivative instruments

	Balance Sheet	Fair Value
	Location	June 30, 2011		December 31, 2010
Cash flow hedge interest rate swaps	Other liabilities	$	1,414	$	482

Impact of derivative instruments on the statement of operations and OCI

		Three Months Ended					Six Months Ended
	Location	June 30, 2011		June 30, 2010			June 30, 2011		June 30, 2010
Gain (loss) on interest rate swap recognized in OCI (effective portion)	n/a	$	949	$	(4,962	)	$	1,841	$	(7,016	)
Gain (loss) reclassified from AOCI into income (effective portion)	Interest expense		563		(794	)		973		(1,598	)
Gain (loss) recognized in income (ineffective portion and amount excluded from effectiveness testing)	Realized loss		—		—			—		—