Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 12,828		$ 29,840
Restricted cash	6,694		6,691
Trade accounts receivable, net of allowances	128,050		114,284
Inventories	117,493		106,546
Assets held for sale	70		214
Prepaid expenses and other current assets	19,334		18,216
Total current assets	284,469		275,791
Property, plant, and equipment:
Land and building	78,889		78,929
Machinery and equipment	1,341,880		1,348,286
Automobiles and trucks	36,326		36,341
Chemical plants	183,207		182,951
Construction in progress	19,161		11,918
Total property, plant, and equipment	1,659,463		1,658,425
Less accumulated depreciation	(735,790)		(712,974)
Net property, plant, and equipment	923,673		945,451
Other assets:
Goodwill	6,636		6,636
Patents, trademarks and other intangible assets, net of accumulated amortization	66,217		67,713
Deferred tax assets, net	28		28
Other assets	18,470		19,921
Total other assets	91,351		94,298
Total assets	1,299,493		1,315,540
Current liabilities:
Trade accounts payable	39,334		45,889
Unearned income	14,448		13,879
Accrued liabilities	45,084		55,636
Current portion of long-term debt	30		30
Decommissioning and other asset retirement obligations, net of current portion	944		1,451
Total current liabilities	99,840		116,885
Long-term debt, net of current portion	640,396		623,730
Deferred income taxes	7,335		7,296
Decommissioning and other asset retirement obligations, net	54,538		54,027
Preferred units	78,260		77,062
Warranty Liability	12,527	$ 18,503
Other liabilities	17,670		17,571
Total long-term liabilities	810,726		798,189
Equity:
Common stock, par value $0.01 per share	1,179		1,179
Additional paid-in capital	420,697		419,232
Treasury stock, at cost	(18,316)		(18,316)
Accumulated other comprehensive income (loss)	(49,233)		(51,285)
Retained earnings	(119,749)		(117,287)
Total TETRA stockholders' equity	234,578		233,523
Noncontrolling interests	154,349		166,943
Total equity	388,927		400,466
Total liabilities and equity	$ 1,299,493		$ 1,315,540