Noncontrolling Interests - Operating Partnership (Tables)

12 Months Ended

Dec. 31, 2015

Noncontrolling Interests - Operating Partnership

Schedule of ownership interests in the Operating Partnership

	December 31, 2015					December 31, 2014
	Number of Units		Percentage of Total			Number of Units		Percentage of Total
CoreSite Realty Corporation		30,136,556		64.1	%		21,287,191		45.6	%
Noncontrolling interests		16,858,347		35.9	%		25,360,847		54.4	%
Total		46,994,903		100.0	%		46,648,038		100.0	%