Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 53,899	$ 26,128
Restricted cash	69	261
Trade accounts receivable, net of allowances	188,830	144,051
Inventories	150,638	115,438
Disposal Group, Including Discontinued Operation, Assets, Current	1,301	34,879
Prepaid expenses and other current assets	19,725	17,597
Total current assets	414,462	338,354
Property, plant, and equipment:
Land and building	78,764	78,559
Machinery and equipment	1,221,746	1,167,680
Automobiles and trucks	36,406	34,744
Chemical plants	188,072	186,790
Construction in progress	62,162	31,566
Total property, plant, and equipment	1,587,150	1,499,339
Less accumulated depreciation	(741,969)	(689,907)
Net property, plant, and equipment	845,181	809,432
Other assets:
Goodwill	22,197	6,636
Patents, trademarks and other intangible assets, net of accumulated amortization	80,963	47,405
Deferred tax assets, net	10	10
Notes, Loans and Financing Receivable, Net, Current	7,540	44
Disposal Group, Including Discontinued Operation, Assets, Noncurrent	0	86,255
Other assets	21,886	20,478
Total other assets	132,596	160,828
Total assets	1,392,239	1,308,614
Current liabilities:
Trade accounts payable	70,756	70,847
Unearned income	38,263	18,701
Accrued liabilities	69,867	58,478
Disposal Group, Including Discontinued Operation, Liabilities, Current	3,570	25,688
Total current liabilities	182,456	173,714
Long-term debt, net	822,905	629,855
Deferred income taxes	3,348	4,404
Decommissioning and other asset retirement obligations, net	12,014	11,738
Preferred Units	36,944	61,436
Warranty Liability	13,224	13,202
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent	0	48,225
Other liabilities	15,159	13,479
Total long-term liabilities	903,594	782,339
Equity:
Common stock, par value $0.01 per share	1,284	1,185
Additional paid-in capital	459,123	425,648
Treasury stock, at cost	(18,936)	(18,651)
Accumulated other comprehensive income (loss)	(50,270)	(43,767)
Retained earnings	(222,884)	(156,335)
Total TETRA stockholders' equity	168,317	208,080
Noncontrolling interests	137,872	144,481
Total equity	306,189	352,561
Total liabilities and equity	$ 1,392,239	$ 1,308,614