Intangibles (Tables)

12 Months Ended

Dec. 31, 2011

Intangibles

Estimated aggregate amortization of intangible assets and liabilities for each of the five succeeding fiscal years and thereafter

	Intangible Assets		Intangible Liabilities
2012	$	52,327	$	17,841
2013		50,087		17,387
2014		47,386		16,925
2015		44,560		16,391
2016		41,571		15,931
Thereafter		137,832		39,667
	$	373,763	$	124,142