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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

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