Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 70,157	$ 26,128
Restricted cash	4,273	261
Trade accounts receivable, net of allowances	181,454	144,051
Inventories	133,367	115,438
Assets held for sale	1,538	121,134
Prepaid expenses and other current assets	19,457	17,597
Total current assets	410,246	424,609
Property, plant, and equipment:
Land and building	79,000	78,559
Machinery and equipment	1,207,766	1,167,680
Automobiles and trucks	36,502	34,744
Chemical plants	188,135	186,790
Construction in progress	44,590	31,566
Total property, plant, and equipment	1,555,993	1,499,339
Less accumulated depreciation	(722,915)	(689,907)
Net property, plant, and equipment	833,078	809,432
Other assets:
Goodwill	22,197	6,636
Patents, trademarks and other intangible assets, net of accumulated amortization	85,878	47,405
Deferred tax assets, net	10	10
Notes, Loans and Financing Receivable, Net, Current	7,501	44
Other assets	20,709	20,478
Total other assets	136,295	74,573
Total assets	1,379,619	1,308,614
Current liabilities:
Trade accounts payable	55,292	70,847
Unearned income	30,718	18,701
Accrued liabilities	72,829	58,478
Disposal Group, Including Discontinued Operation, Liabilities	8,343	73,913
Total current liabilities	167,182	221,939
Long-term debt, net of current portion	810,739	629,855
Deferred income taxes	3,889	4,404
Decommissioning and other asset retirement obligations, net	12,073	11,738
Preferred Units	45,644	61,436
Warranty Liability	13,403	13,202
Other liabilities	15,627	13,479
Total long-term liabilities	901,375	734,114
Equity:
Common stock, par value $0.01 per share	1,283	1,185
Additional paid-in capital	457,082	425,648
Treasury stock, at cost	(18,865)	(18,651)
Accumulated other comprehensive income (loss)	(49,594)	(43,767)
Retained earnings	(215,948)	(156,335)
Total TETRA stockholders' equity	173,958	208,080
Noncontrolling interests	137,104	144,481
Total equity	311,062	352,561
Total liabilities and equity	$ 1,379,619	$ 1,308,614