Acquisitions - Purchase Price Allocation to the Identifiable Intangible Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Apr. 02, 2018
Acquired Indefinite-lived Intangible Assets [Line Items]
Net intangible assets	$ 111,837	$ 119,409
Noralta
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortizable Intangible Assets			$ 110,736
Amortizable Intangible Liabilities			2,456
Net intangible assets			108,280
Noralta | Unfavorable lease contracts
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortizable Intangible Liabilities			2,456
Noralta | Trade name
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortizable Intangible Assets			1,474
Noralta | Contracts
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortizable Intangible Assets			106,766
Noralta | Favorable lease contract
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortizable Intangible Assets			$ 2,496