Revenues - Schedule of Revenues Disaggregated by Revenue Source (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Total Service Revenue	$ 34,471	$ 39,001
Rental Revenue	3,471	3,626
Total revenue	37,942	42,627
Corporate/Other
Disaggregation of Revenue [Line Items]
Total Service Revenue	0	0
Rental Revenue	0	0
Total revenue	0	0
Water Transport Services
Disaggregation of Revenue [Line Items]
Total Service Revenue	23,714	27,165
Water Transport Services | Corporate/Other
Disaggregation of Revenue [Line Items]
Total Service Revenue	0	0
Disposal Services
Disaggregation of Revenue [Line Items]
Total Service Revenue	8,365	9,976
Disposal Services | Corporate/Other
Disaggregation of Revenue [Line Items]
Total Service Revenue	0	0
Other Revenue
Disaggregation of Revenue [Line Items]
Total Service Revenue	2,392	1,860
Other Revenue | Corporate/Other
Disaggregation of Revenue [Line Items]
Total Service Revenue	0	0
Rocky Mountain | Operating Segments
Disaggregation of Revenue [Line Items]
Total Service Revenue	20,036	21,326
Rental Revenue	3,432	3,551
Total revenue	23,468	24,877
Rocky Mountain | Water Transport Services | Operating Segments
Disaggregation of Revenue [Line Items]
Total Service Revenue	14,314	15,709
Rocky Mountain | Disposal Services | Operating Segments
Disaggregation of Revenue [Line Items]
Total Service Revenue	3,856	4,071
Rocky Mountain | Other Revenue | Operating Segments
Disaggregation of Revenue [Line Items]
Total Service Revenue	1,866	1,546
Northeast | Operating Segments
Disaggregation of Revenue [Line Items]
Total Service Revenue	9,759	11,773
Rental Revenue	35	67
Total revenue	9,794	11,840
Northeast | Water Transport Services | Operating Segments
Disaggregation of Revenue [Line Items]
Total Service Revenue	7,144	7,972
Northeast | Disposal Services | Operating Segments
Disaggregation of Revenue [Line Items]
Total Service Revenue	2,163	3,499
Northeast | Other Revenue | Operating Segments
Disaggregation of Revenue [Line Items]
Total Service Revenue	452	302
Southern | Operating Segments
Disaggregation of Revenue [Line Items]
Total Service Revenue	4,676	5,902
Rental Revenue	4	8
Total revenue	4,680	5,910
Southern | Water Transport Services | Operating Segments
Disaggregation of Revenue [Line Items]
Total Service Revenue	2,256	3,484
Southern | Disposal Services | Operating Segments
Disaggregation of Revenue [Line Items]
Total Service Revenue	2,346	2,406
Southern | Other Revenue | Operating Segments
Disaggregation of Revenue [Line Items]
Total Service Revenue	$ 74	$ 12