Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2011	Dec. 31, 2010
Current assets
Cash and cash equivalents	$ 323,774	$ 65,360
Restricted cash	102	360
Trade accounts receivable, net of allowances for doubtful accounts of $2,591 in 2011 and $2,590 in 2010	161,082	162,405
Inventories	94,945	104,305
Derivative assets	0	2,436
Deferred tax assets	32,575	29,685
Oil and gas properties held for sale	9,215	0
Prepaid expenses and other current assets	22,568	50,387
Total current assets	644,261	414,938
Property, plant and equipment
Land and building	76,994	79,368
Machinery and equipment	445,450	482,677
Automobiles and trucks	46,315	43,492
Chemical plants	157,637	176,853
Oil and gas producing assets (successful efforts method)	0	761,449
Construction in progress	22,689	15,677
Total property, plant, and equipment	749,085	1,559,516
Less accumulated depreciation and depletion	(281,968)	(819,646)
Net property, plant, and equipment	467,117	739,870
Other assets
Goodwill	99,132	99,005
Patents, trademarks and other intangible assets, net of accumulated amortization of $21,512 in 2011 and $21,499 in 2010	13,246	13,024
Deferred tax assets	12	899
Other assets	27,184	31,892
Total other assets	139,574	144,820
Total assets	1,250,952	1,299,628
Current liabilities
Trade accounts payable	50,931	55,555
Accrued liabilities	78,129	83,804
Decommissioning and other asset retirement obligations, current	89,390	72,265
Derivative liabilities	0	5,208
Total current liabilities	218,450	216,832
Long-term debt, net	305,035	305,035
Deferred income taxes	59,677	46,789
Decommissioning and other asset retirement obligations, net	55,135	200,550
Other liabilities	11,047	14,099
Total long-term and other liabilities	430,894	566,473
Equity
Common stock, par value $0.01 per share; 100,000,000 shares authorized; 78,843,704 shares issued at June 30, 2011, and 77,825,398 shares issued at December 31, 2010	788	778
Additional paid-in capital	210,558	203,044
Treasury stock, at cost; 1,696,989 shares held at June 30, 2011, and 1,533,653 shares held at December 31, 2010	(9,836)	(8,382)
Accumulated other comprehensive income	9,483	1,107
Retained earnings	347,635	319,776
Total TETRA stockholders' equity	558,628	516,323
Noncontrolling interest	42,980	0
Total equity	601,608	516,323
Total liabilities and equity	$ 1,250,952	$ 1,299,628