Assets Held for Sale - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) Property	Dec. 31, 2018 Property	Mar. 31, 2020 USD ($) Property	Dec. 31, 2019 USD ($)	Dec. 31, 2017 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale, estimated fair value less costs of sale			$ 6,332	$ 7,589
Undeveloped Land Positions in the British Columbia Segment | Canadian
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of land positions	$ 4,000
Number of land positions | Property	4
Assets held for sale, estimated fair value less costs of sale			$ 1,500
Modular Construction and Manufacturing Plant Near Edmonton, Alberta, Canada | Canadian
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale, estimated fair value less costs of sale					$ 3,800
Noralta | Noralta | Canadian
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties | Property			2
Number of real estate properties sold | Property		1
Estimated fair value of remaining property			$ 1,000