Property

Our property consisted of the following (in thousands):



	December 31,
	2015		2014
Land	$	929,958	$	821,614
Land held for development	95,524		103,349
Land under development	17,367		24,297
Buildings and improvements	3,152,215		3,061,616
Construction in-progress	67,895		65,218
Total	$	4,262,959	$	4,076,094

During the year ended December 31, 2015, we sold 11 centers and other property. Aggregate gross sales proceeds from these transactions approximated $107.7 million and generated gains of approximately $59.6 million. Also, during the year ended December 31, 2015, we acquired seven centers and other property with an aggregate gross purchase price of approximately $240.2 million and invested $26.1 million in new development projects.

At December 31, 2015, one center, totaling $53.2 million before accumulated depreciation, was classified as held for sale. At December 31, 2014, one center, totaling $9.4 million before accumulated depreciation, was classified as held for sale. Neither of these centers qualified to be reported as discontinued operations, and each was sold subsequent to the applicable reporting period.