Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 104,113	$ 26,128
Restricted cash	8,978	261
Trade accounts receivable, net of allowances	175,262	144,051
Inventories	127,925	115,438
Assets held for sale	7,907	121,134
Prepaid expenses and other current assets	22,618	17,597
Total current assets	446,803	424,609
Property, plant, and equipment:
Land and building	78,940	78,559
Machinery and equipment	1,195,458	1,167,680
Automobiles and trucks	36,392	34,744
Chemical plants	189,173	186,790
Construction in progress	37,930	31,566
Total property, plant, and equipment	1,537,893	1,499,339
Less accumulated depreciation	(713,125)	(689,907)
Net property, plant, and equipment	824,768	809,432
Other assets:
Goodwill	21,856	6,636
Patents, trademarks and other intangible assets, net of accumulated amortization	88,134	47,405
Deferred tax assets, net	10	10
Notes, Loans and Financing Receivable, Net, Current	7,462	44
Other assets	19,229	20,478
Total other assets	136,691	74,573
Total assets	1,408,262	1,308,614
Current liabilities:
Trade accounts payable	60,135	70,847
Unearned income	38,168	18,701
Accrued liabilities	45,171	58,478
Disposal Group, Including Discontinued Operation, Liabilities	14,287	71,874
Total current liabilities	157,761	219,900
Long-term debt, net of current portion	823,565	629,855
Deferred income taxes	4,040	4,404
Decommissioning and other asset retirement obligations, net	11,929	11,738
Preferred Units	54,214	61,436
Warranty Liability	11,207	13,202
Other liabilities	20,085	15,518
Total long-term liabilities	925,040	736,153
Equity:
Common stock, par value $0.01 per share	1,282	1,185
Additional paid-in capital	455,046	425,648
Treasury stock, at cost	(18,821)	(18,651)
Accumulated other comprehensive income (loss)	(42,099)	(43,767)
Retained earnings	(209,983)	(156,335)
Total TETRA stockholders' equity	185,425	208,080
Noncontrolling interests	140,036	144,481
Total equity	325,461	352,561
Total liabilities and equity	$ 1,408,262	$ 1,308,614