Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Measured at fair value on a recurring basis:
Derivative Assets	$ 0	$ 6,855
Derivative Liabilities	9,611	6,094
Significant Observable Inputs (Level 2) | Cross-currency swap
Measured at fair value on a recurring basis:
Derivative Liabilities	9,611	0
Measured at fair value on a recurring basis | Significant Observable Inputs (Level 2) | Interest rate contracts
Measured at fair value on a recurring basis:
Derivative Assets	0	2,936
Derivative Liabilities	0	3,507
Measured at fair value on a recurring basis | Significant Observable Inputs (Level 2) | Cross-currency swap
Measured at fair value on a recurring basis:
Derivative Assets	0	1,404
Measured at fair value on a recurring basis | Significant Observable Inputs (Level 2) | Foreign exchange forwards
Measured at fair value on a recurring basis:
Derivative Assets	0	2,546
Derivative Liabilities	0	2,589
Disclose at fair value | Significant Unobservable Inputs (Level 3)
Disclosed at fair value:
Mortgage notes, senior unsecured notes and term loans	2,827,440	1,783,463
Pension | Measured at fair value on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Measured at fair value on a recurring basis:
Assets	41,009	35,317
Pension | Measured at fair value on a recurring basis | Significant Observable Inputs (Level 2)
Measured at fair value on a recurring basis:
Assets	$ 37,652	$ 33,991