Partners' Capital, Equity and Incentive Compensation Plans - Summary of Award Activity Under 2010 Equity Incentive Plan and 2013 Equity Incentive Plan and Related Information (Details)	6 Months Ended
	Jun. 30, 2021 $ / shares shares
Options
Ending balance (in shares) \| shares	100,000
2010 Equity Incentive Plan \| Class O Units
Numbers of Class O units
Granted (in shares) \| shares	0
Cancelled/Expired (in shares) \| shares	0
Weighted average exercise price
Granted (in dollars per share)	$ 0
Cancelled/Expired (in dollars per share)	0
Weighted average fair value
Granted (in dollars per share)	0
Cancelled/Expired (in dollars per share)	$ 0
2010 Equity Incentive Plan \| Class O Units
Numbers of Class O units
Beginning balance (in shares) \| shares	75,435
Exercised/Vested (in shares) \| shares	0
Ending balance (in shares) \| shares	75,435
Weighted average exercise price
Beginning balance (in dollars per share)	$ 25.00
Exercised/Vested (in dollars per share)	0
Ending balance (in dollars per share)	25.00
Weighted average fair value
Beginning balance (in dollars per share)	6.11
Exercised/Vested (in dollars per share)	0
Ending balance (in dollars per share)	$ 6.11
2013 Equity Incentive Plan \| Options
Options
Beginning balance (in shares) \| shares	1,936,407
Granted (in shares) \| shares	96,366
Exercised/Vested (in shares) \| shares	(51,220)
Cancelled/Expired (in shares) \| shares	0
Ending balance (in shares) \| shares	1,981,553
Weighted average exercise price
Beginning balance (in dollars per share)	$ 38.55
Granted (in dollars per share)	59.06
Exercised/Vested (in dollars per share)	38.63
Cancelled/Expired (in dollars per share)	0
Ending balance (in dollars per share)	39.55
Weighted average fair value
Beginning balance (in dollars per share)	7.26
Granted (in dollars per share)	10.53
Exercised/Vested (in dollars per share)	7.91
Cancelled/Expired (in dollars per share)	0
Ending balance (in dollars per share)	$ 7.40
2013 Equity Incentive Plan \| Restricted Stock
Options
Beginning balance (in shares) \| shares	416,496
Granted (in shares) \| shares	271,625
Exercised/Vested (in shares) \| shares	(171,236)
Cancelled/Expired (in shares) \| shares	(4,305)
Ending balance (in shares) \| shares	512,580
Weighted average fair value
Beginning balance (in dollars per share)	$ 52.20
Granted (in dollars per share)	59.09
Exercised/Vested (in dollars per share)	52.63
Cancelled/Expired (in dollars per share)	57.38
Ending balance (in dollars per share)	$ 55.66
2013 Equity Incentive Plan \| Performance-Based Relative TSR Units
Numbers of Class O units
Cancelled/Expired (in shares) \| shares	0
Weighted average exercise price
Exercised/Vested (in dollars per share)	$ 0
Options
Beginning balance (in shares) \| shares	168,552
Granted (in shares) \| shares	105,402
Ending balance (in shares) \| shares	273,954
Weighted average fair value
Beginning balance (in dollars per share)	$ 66.90
Granted (in dollars per share)	$ 64.72
Exercised/Vested (in dollars per share) \| shares	0
Cancelled/Expired (in dollars per share)	$ 0
Ending balance (in dollars per share)	$ 66.06
Percent of target	100.00%
2013 Equity Incentive Plan \| Performance-Based FFO Units
Numbers of Class O units
Cancelled/Expired (in shares) \| shares	0
Weighted average exercise price
Exercised/Vested (in dollars per share)	$ 0
Options
Beginning balance (in shares) \| shares	132,267
Granted (in shares) \| shares	105,402
Ending balance (in shares) \| shares	237,669
Weighted average fair value
Beginning balance (in dollars per share)	$ 51.45
Granted (in dollars per share)	$ 59.06
Exercised/Vested (in dollars per share) \| shares	0
Cancelled/Expired (in dollars per share)	$ 0
Ending balance (in dollars per share)	$ 54.82
Percent of target	100.00%

QTS Realty Trust, Inc. 10-Q