Derivative Instruments (Outstanding Interest Rate Derivatives) (Details) $ in Thousands	Dec. 31, 2019 USD ($) $ / $	Dec. 31, 2018 USD ($) $ / $
Currently-paying contracts
Notional Amount	$ 479,825	$ 783,125
Level 2
Currently-paying contracts
Fair value of derivatives	$ 2,396	20,119
Interest Rate Swap, 1.611
Currently-paying contracts
Notional Amount		206,000
Strike Rate	1.611%
Interest Rate Swap, 1.611 | Level 2
Currently-paying contracts
Fair value of derivatives		1,976
Interest Rate Swap, 1.605
Currently-paying contracts
Notional Amount		54,905
Strike Rate	1.605%
Interest Rate Swap, 1.605 | Level 2
Currently-paying contracts
Fair value of derivatives		517
Interest Rate Swap 1.016
Currently-paying contracts
Notional Amount	$ 29,000	75,000
Strike Rate	1.016%
Interest Rate Swap 1.016 | Level 2
Currently-paying contracts
Fair value of derivatives	$ 175	2,169
Interest Rate Swap, 1.164
Currently-paying contracts
Notional Amount	$ 75,000	75,000
Strike Rate	1.164%
Interest Rate Swap, 1.164 | Level 2
Currently-paying contracts
Fair value of derivatives	$ 345	1,970
Interest Rate Swap, 1.435
Currently-paying contracts
Notional Amount	$ 300,000	300,000
Strike Rate	1.435%
Interest Rate Swap, 1.435 | Level 2
Currently-paying contracts
Fair value of derivatives	$ 945	11,463
Interest Rate Swap, 0.779
Currently-paying contracts
Notional Amount	$ 75,825	72,220
Strike Rate	0.779%
Interest Rate Swap, 0.779 | Level 2
Currently-paying contracts
Fair value of derivatives	$ 931	$ 2,024
Digital Realty Trust, L.P. | Canadian dollar (CAD)
Currently-paying contracts
Exchange rate | $ / $	0.77	0.73