Consolidated Statement of Equity Statement - USD ($) $ in Thousands	Total	Common Stock Par Value	Additional Paid-In Capital	Treasury Stock	Accumulated Other  Comprehensive Income (Loss)	Unrealized Gain (Loss) on Investment	Retained Deficit	Noncontrolling Interest
Balance at beginning of period at Dec. 31, 2020	$ 71,062	$ 1,289	$ 472,134	$ (19,484)	$ (49,914)		$ (413,665)	$ 80,702
Net income, retained deficit							108,714
Net income	109,047							333
Translation adjustment, net of taxes	(2,779)				(2,779)			0
Comprehensive income	106,268
Deconsolidation of CSI Compressco, currency translation					7,168
Deconsolidation of CSI Compressco	(75,607)							(82,775)
Equity award activity	6	6
Treasury stock activity, net	(449)			(449)
Equity compensation expense	1,542		962					580
Other	(355)		(574)					219
Balance at end of period at Mar. 31, 2021	102,467	1,295	472,522	(19,933)	(45,525)		(304,951)	(941)
Balance at beginning of period at Dec. 31, 2020	71,062	1,289	472,134	(19,484)	(49,914)		(413,665)	80,702
Net income, retained deficit	104,474
Net income	104,780
Other comprehensive income (loss)	0
Comprehensive income	102,008
Balance at end of period at Sep. 30, 2021	100,078	1,301	474,544	(19,945)	(45,518)		(309,191)	(1,113)
Balance at beginning of period at Mar. 31, 2021	102,467	1,295	472,522	(19,933)	(45,525)		(304,951)	(941)
Net income, retained deficit							(6,753)
Net income	(6,780)							(27)
Translation adjustment, net of taxes	2,157				2,157			0
Comprehensive income	(4,623)
Deconsolidation of CSI Compressco	(119)							119
Equity award activity	2	2
Treasury stock activity, net	(6)			(6)
Equity compensation expense	1,592		1,592					0
Other	(256)		(242)					(14)
Balance at end of period at Jun. 30, 2021	99,057	1,297	473,872	(19,939)	(43,368)		(311,704)	(1,101)
Net income, retained deficit	2,513						2,513
Net income	2,513							0
Translation adjustment, net of taxes	(2,150)				(2,150)			0
Other comprehensive income (loss)	0
Comprehensive income	363
Equity award activity	4	4
Treasury stock activity, net	(6)			(6)
Equity compensation expense	1,057		1,057					0
Other	(397)		(385)					(12)
Balance at end of period at Sep. 30, 2021	100,078	1,301	474,544	(19,945)	(45,518)		(309,191)	(1,113)
Balance at beginning of period at Dec. 31, 2021	98,563	1,301	475,624	(19,957)	(46,932)	$ 0	(310,332)	(1,141)
Net income, retained deficit							7,720
Net income	7,719							(1)
Translation adjustment, net of taxes	192							0
Comprehensive income	7,911
Equity compensation expense	1,104		1,104					0
Other	(676)	7	(673)					(10)
Balance at end of period at Mar. 31, 2022	106,902	1,308	476,055	(19,957)	(46,740)	0	(302,612)	(1,152)
Balance at beginning of period at Dec. 31, 2021	98,563	1,301	475,624	(19,957)	(46,932)	0	(310,332)	(1,141)
Net income, retained deficit	9,743
Net income	9,700
Other comprehensive income (loss)	(306)
Comprehensive income	2,299
Balance at end of period at Sep. 30, 2022	101,756	1,318	476,530	(19,957)	(54,027)	(306)	(300,589)	(1,213)
Balance at beginning of period at Mar. 31, 2022	106,902	1,308	476,055	(19,957)	(46,740)	0	(302,612)	(1,152)
Net income, retained deficit							1,745
Net income	1,725							(20)
Translation adjustment, net of taxes	(3,414)				(3,414)			0
Comprehensive income	(1,689)
Equity compensation expense	1,159		1,159					0
Other	(836)	6	(833)					(9)
Balance at end of period at Jun. 30, 2022	105,536	1,314	476,381	(19,957)	(50,154)	0	(300,867)	(1,181)
Net income, retained deficit	278						278
Net income	256							(22)
Translation adjustment, net of taxes	(3,873)				(3,873)			0
Other comprehensive income (loss)	(306)					(306)
Comprehensive income	(3,923)
Equity compensation expense	1,098		1,098					0
Other	(955)	4	(949)					(10)
Balance at end of period at Sep. 30, 2022	$ 101,756	$ 1,318	$ 476,530	$ (19,957)	$ (54,027)	$ (306)	$ (300,589)	$ (1,213)