Commitments and Contingencies (Details)	Sep. 30, 2017 subsidiary
Commitments and Contingencies [Abstract]
Number of subsidiaries named as a defendant	1

Number of subsidiaries named as a defendant in a lawsuit.

No definition available.

Name:	qts_NumberOfSubsidiariesNamedAsDefendants
Namespace Prefix:	qts_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant