11. Rental Income

The Operating Partnership is the lessor and the sublessor to tenants under operating leases with expiration dates ranging from January 1, 2013 to 2037. The minimum rental amounts due under the leases are generally either subject to scheduled fixed increases or adjustments. The leases generally also require that the tenants reimburse us for increases in certain operating costs and real estate taxes above their base year costs. Approximate future minimum rents to be received over the next five years and thereafter for non-cancelable operating leases in effect at December 31, 2012 for the consolidated properties, including consolidated joint venture properties, and our share of unconsolidated joint venture properties are as follows (amounts in thousands):

	Consolidated Properties		Unconsolidated Properties

2013	$	989,702	$	214,291
2014		917,638		208,617
2015		863,405		195,122
2016		801,448		185,113
2017		717,112		168,718
Thereafter		3,915,024		720,492

	$	8,204,329	$	1,692,353