Real Estate - Cost Allocation of Asset Acquisitions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
2019 Acquisitions
Real Estate [Line Items]
Net lease intangible liabilities	$ 0
Deferred tax liability	0
Total	531,528
2019 Acquisitions | Tenant origination costs
Real Estate [Line Items]
Intangible assets	0
2019 Acquisitions | Leasing commissions absorption costs
Real Estate [Line Items]
Intangible assets	15,474
2019 Acquisitions | Net lease intangible assets
Real Estate [Line Items]
Intangible assets	0
2019 Acquisitions | Land
Real Estate [Line Items]
Property, plant and equipment	92,391
2019 Acquisitions | Building and improvements
Real Estate [Line Items]
Property, plant and equipment	$ 423,663
2018 Acquisitions
Real Estate [Line Items]
Net lease intangible liabilities		$ (545)
Deferred tax liability		0
Total		250,557
2018 Acquisitions | Tenant origination costs
Real Estate [Line Items]
Intangible assets		13,625
2018 Acquisitions | Leasing commissions absorption costs
Real Estate [Line Items]
Intangible assets		27,465
2018 Acquisitions | Net lease intangible assets
Real Estate [Line Items]
Intangible assets		3,142
2018 Acquisitions | Land
Real Estate [Line Items]
Property, plant and equipment		63,970
2018 Acquisitions | Building and improvements
Real Estate [Line Items]
Property, plant and equipment		$ 142,900
2017 Acquisitions
Real Estate [Line Items]
Net lease intangible liabilities			$ (9,585)
Deferred tax liability			(560)
Total			137,820
2017 Acquisitions | Tenant origination costs
Real Estate [Line Items]
Intangible assets			12,084
2017 Acquisitions | Leasing commissions absorption costs
Real Estate [Line Items]
Intangible assets			23,161
2017 Acquisitions | Net lease intangible assets
Real Estate [Line Items]
Intangible assets			498
2017 Acquisitions | Land
Real Estate [Line Items]
Property, plant and equipment			45,981
2017 Acquisitions | Building and improvements
Real Estate [Line Items]
Property, plant and equipment			$ 66,241