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Discontinued Operations
 3 Months Ended
Mar. 31, 2021
Discontinued Operations and Disposal Groups [Abstract]  
Discontinued Operations DISCONTINUED OPERATIONS
    On January 29, 2021, we entered into the Purchase and Sale Agreement with Spartan Energy Partners, LP (“Spartan”) pursuant to which we sold the general partner of CSI Compressco, including the IDRs in CSI Compressco and approximately 23.1% of the outstanding limited partner interests in CSI Compressco, in exchange for the combination of $13.4 million in cash paid at closing, $0.5 million in cash payable on the six-month anniversary of the closing and $3.1 million in contingent consideration in the form of cash and/or CSI Compressco common units if CSI Compressco achieves certain financial targets on or before December 31, 2022. Throughout this Quarterly Report, we refer to the transaction with Spartan as the “GP Sale.” As a result of these transactions, we no longer consolidate CSI Compressco as of January 29, 2021. We recognized a primarily non-cash accounting gain of $120.6 million during the first quarter of 2021 related to the GP Sale. The gain is included in income (loss) from discontinued operations, net of taxes in our consolidated statement of operations. We will also continue to provide back-office support to CSI Compressco under a Transition Services Agreement for up to one year until CSI Compressco has completed a full separation from our back-office support functions.

Our interest in CSI Compressco and the general partner represented substantially all of our Compression Division. In addition, on March 1, 2018, we closed a series of related transactions that resulted in the disposition of our Offshore Division, consisting of our Offshore Services and Maritech segments. Our former Compression and Offshore Divisions are reported as discontinued operations for all periods presented. Our consolidated balance sheets and consolidated statements of operations report discontinued operations separate from continuing operations. Our consolidated statements of comprehensive income, statements of equity and statements of cash flows combine continuing and discontinued operations. Our current-year consolidated statement of operations, statement of comprehensive income, statement of equity and statement of cash flows include CSI Compressco activity for January 1 through January 29. Our consolidated statements of cash flows for the three-month periods ended March 31, 2021 and March 31, 2020 included $3.0 million and $6.5 million, respectively, of capital expenditures related to our former Compression division, as well as amortization of deferred financing discounts, costs and gains of $0.7 million for the three-month period ended March 31, 2020. Our current-year results do not include CSI Compressco depreciation or amortization as the assets were considered held for sale. A summary of financial information related to our discontinued operations is as follows:

Reconciliation of the Line Items Constituting Pretax Loss from Discontinued Operations to the After-Tax Loss from Discontinued Operations
(in thousands)
Three Months Ended
March 31, 2021
CompressionOffshore ServicesTotal
Major classes of line items constituting income from discontinued operations
Revenue$18,968 $— $18,968 
Cost of revenues11,474 28 11,502 
General and administrative expense2,795 (5)2,790 
Interest expense, net4,336 — 4,336 
Other expense, net(106)— (106)
Pretax income (loss) from discontinued operations469 (23)446 
Pretax gain on disposal of discontinued operations120,574 
Total pretax income from discontinued operations121,020 
Income tax provision30 
Total income from discontinued operations$120,990 
Income from discontinued operations attributable to noncontrolling interest$(333)
Income from discontinued operations attributable to TETRA stockholders$120,657 
Three Months Ended
March 31, 2020
CompressionOffshore ServicesTotal
Major classes of line items constituting loss from discontinued operations
Revenue$90,238 $— $90,238 
Cost of revenues54,579 (60)54,519 
Depreciation, amortization, and accretion19,908 — 19,908 
Impairments and other charges5,371 — 5,371 
General and administrative expense10,189 205 10,394 
Interest expense, net12,564 — 12,564 
Other expense, net417 — 417 
Pretax (loss) from discontinued operations(12,790)(145)(12,935)
Income tax provision433 
Total loss from discontinued operations$(13,368)
Loss from discontinued operations attributable to noncontrolling interest$8,834 
Loss from discontinued operations attributable to TETRA stockholders$(4,534)
    
Reconciliation of Major Classes of Assets and Liabilities of the Discontinued Operations to Amounts Presented Separately in the Statement of Financial Position
(in thousands)
March 31, 2021
Offshore ServicesMaritechTotal
Carrying amounts of major classes of liabilities included as part of discontinued operations
Trade payables$1,222 $— $1,222 
Accrued liabilities and other296 228 524 
Total liabilities associated with discontinued operations$1,518 $228 $1,746 

December 31, 2020
CompressionOffshore ServicesMaritechTotal
Carrying amounts of major classes of assets included as part of discontinued operations
Cash and cash equivalents$16,577 $— $— $16,577 
Trade receivables43,837 — — 43,837 
Inventories31,220 — — 31,220 
Other current assets5,231 — — 5,231 
Property, plant, and equipment551,401 — — 551,401 
Other assets61,740 — — 61,740 
Total assets associated with discontinued operations$710,006 $— $— $710,006 
Carrying amounts of major classes of liabilities included as part of discontinued operations
Trade payables$19,766 $1,222 $— $20,988 
Unearned Income269 — — 269 
Accrued liabilities and other36,318 352 228 36,898 
Long-term debt, net638,631 — — 638,631 
Other liabilities37,253 — — 37,253 
Total liabilities associated with discontinued operations$732,237 $1,574 $228 $734,039 
See Note 8 - “Commitments and Contingencies” for further discussion of contingencies associated with discontinued operations.