Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues:
Total revenues	$ 96,779	$ 84,522	$ 188,150	$ 164,534
Cost of revenues (excluding depreciation and amortization expense):
Total cost of revenues	53,495	47,563	105,298	90,204
Depreciation and amortization	19,086	19,346	37,937	38,705
Selling, general, and administrative expense	12,291	10,911	22,270	21,752
Interest expense, net of capitalized interest of $7 and $10 in 2023 and $103 and $181 in 2022	13,747	12,556	27,062	24,937
Other (income) expense, net	(191)	325	(707)	869
Loss before taxes and discontinued operations	(1,649)	(6,179)	(3,710)	(11,933)
Provision for income taxes	924	741	1,476	1,557
Loss from continuing operations	(2,573)	(6,920)	(5,186)	(13,490)
Income (loss) from discontinued operations, net of taxes	0	92	0	92
Net loss	(2,573)	(6,828)	(5,186)	(13,398)
General partner interest in net loss	(12)	(32)	(24)	(63)
Common units interest in net loss	$ (2,561)	$ (6,796)	$ (5,162)	$ (13,335)
Earnings Per Unit [Abstract]
Net loss per common unit, basic (in dollars per share)	$ (0.02)	$ (0.05)	$ (0.04)	$ (0.09)
Net loss per common unit, diluted (in dollars per share)	$ (0.02)	$ (0.05)	$ (0.04)	$ (0.09)
Weighted average common units outstanding:
Basic (in shares)	141,995,028	141,213,944	141,804,367	140,993,400
Diluted (in shares)	141,995,028	141,213,944	141,804,367	140,993,400
Contract services
Revenues:
Total revenues	$ 70,521	$ 64,348	$ 140,168	$ 127,155
Cost of revenues (excluding depreciation and amortization expense):
Total cost of revenues	35,767	33,585	72,594	64,625
Aftermarket services
Revenues:
Total revenues	21,209	16,213	38,560	29,081
Cost of revenues (excluding depreciation and amortization expense):
Total cost of revenues	16,924	13,362	31,138	23,995
Equipment rentals
Revenues:
Total revenues	4,773	3,618	8,887	7,118
Cost of revenues (excluding depreciation and amortization expense):
Total cost of revenues	555	451	1,110	967
Equipment sales
Revenues:
Total revenues	276	343	535	1,180
Cost of revenues (excluding depreciation and amortization expense):
Total cost of revenues	$ 249	$ 165	$ 456	$ 617