Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 41,941	$ 48,384
Restricted cash	8,697	8,721
Trade accounts receivable, net of allowances for doubtful accounts of $5,299 in 2015 and $2,485 in 2014	190,908	226,966
Deferred tax asset, net	351	392
Inventories	181,942	189,357
Assets held for sale	0	2,568
Prepaid expenses and other current assets	27,634	24,463
Total current assets	451,473	500,851
Property, plant, and equipment:
Land and building	79,173	75,200
Machinery and equipment	1,359,786	1,292,734
Automobiles and trucks	51,311	57,035
Chemical plants	180,078	174,108
Construction in progress	6,894	21,483
Total property, plant, and equipment	1,677,242	1,620,560
Less accumulated depreciation	(556,428)	(496,368)
Net property, plant, and equipment	1,120,814	1,124,192
Other assets:
Goodwill	293,278	293,866
Patents, trademarks and other intangible assets, net of accumulated amortization of $46,095 in 2015 and $39,754 in 2014	99,813	105,967
Deferred tax assets, net	1,974	1,791
Other assets	36,293	40,966
Total other assets	431,358	442,590
Total assets	2,003,645	2,067,633
Current liabilities:
Trade accounts payable	79,720	119,240
Unearned income	58,884	70,688
Accrued liabilities	86,986	85,681
Current portion of long-term debt	90,000	90,074
Decommissioning and other asset retirement obligations, net of current portion	11,521	12,758
Total current liabilities	327,111	378,441
Long-term debt, net of current portion	846,112	844,961
Deferred income taxes	9,538	10,525
Decommissioning and other asset retirement obligations, net	47,887	49,983
Other liabilities	17,953	18,122
Total long-term liabilities	921,490	923,591
Equity:
Common stock, par value $0.01 per share; 100,000,000 shares authorized; 82,924,318 shares issued at June 30, 2015, and 82,322,876 shares issued at December 31, 2014	829	823
Additional paid-in capital	244,053	241,166
Treasury stock, at cost; 2,731,509 shares held at June 30, 2015, and 2,672,930 shares held at December 31, 2014	(16,664)	(16,419)
Accumulated other comprehensive income (loss)	(33,644)	(26,215)
Retained earnings	180,835	170,358
Total TETRA stockholders' equity	375,409	369,713
Noncontrolling interests	379,635	395,888
Total equity	755,044	765,601
Total liabilities and equity	$ 2,003,645	$ 2,067,633