Property, Plant and Equipment - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Amortization of right-of-use assets	$ 1,542
Amortization expense on assets recorded under capital leases		$ 800	$ 1,500
Accumulated depreciation and amortization, capital lease assets		284,287
Related Party
Property, Plant and Equipment [Line Items]
Accumulated depreciation and amortization, capital lease assets		800
Non-Related Party
Property, Plant and Equipment [Line Items]
Accumulated depreciation and amortization, capital lease assets		$ 8,300
Finance lease, accumulated amortization	$ 2,400