Long-Term Debt and Other Borrowings (Details) $ in Thousands	6 Months Ended
Jun. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Debt Instrument [Line Items]
Long-term debt	$ 810,739	$ 629,855
Less current portion	0	0
Long-term debt, net of current portion	$ 810,739	629,855
Debt covenants, maximum leverage ratio	4.75
Fixed charge coverage ratio	2.87
Line of credit facility, minimum interest coverage ratio	1.25
Proceeds from Issuance of Debt	$ 343,800
Debt Instrument, Fee Amount	6,700
Payments of Financing Costs	3,540
Parent Company [Member]
Debt Instrument [Line Items]
Long-term debt	178,247	117,679
Less current portion	0	0
Long-term debt, net of current portion	$ 178,247	117,679
Debt leverage ratio	2.18
Line of Credit [Member] \| Parent Company [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Sep. 30, 2019
Long-term debt	$ 59,906	0
Unamortized deferred finance costs	1,000	$ 0
Bank line of credit, outstanding balance	61,000
Bank line of credit, letters of credit and guarantees	6,800
Bank line of credit, net availability	$ 132,200
2015 Senior Notes [Member] \| Parent Company [Member]
Debt Instrument [Line Items]
Senior Note interest rate	11.00%	11.00%
Debt Instrument, Maturity Date	Nov. 05, 2022
Long-term debt	$ 118,341	$ 117,679
Unamortized discount	3,600	3,900
Unamortized deferred finance costs	3,100	3,400
CSI Compressco [Member]
Debt Instrument [Line Items]
Long-term debt	$ 632,492	512,176
CSI Compressco [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Aug. 04, 2019
Long-term debt	$ 0	223,985
Unamortized deferred finance costs	$ 0	$ 4,000
CSI Compressco [Member] \| Compressco Partners Senior Notes [Member]
Debt Instrument [Line Items]
Senior Note interest rate	7.25%	7.25%
Debt Instrument, Maturity Date	Aug. 15, 2022
Long-term debt	$ 288,989	$ 288,191
Unamortized discount	2,500	2,800
Unamortized deferred finance costs	4,400	5,000
CSI Compressco [Member] \| New Credit Agreement [Member]
Debt Instrument [Line Items]
Long-term debt	0	$ 0
Unamortized deferred finance costs	$ 1,300
Debt Instrument, Redemption, Period One [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	100.00%
Debt Instrument, Redemption, Period Two [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	100.00%
Debt Instrument, Redemption, Period Three [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	100.00%
Debt Instrument, Redemption, Period Four [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage	100.00%

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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The cash outflow for loan and debt issuance costs.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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Indebtedness divided by net capital.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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