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Industry Segments (Details 1) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |  | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended
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Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Dec. 31, 2013 | Jun. 30, 2014 Fluids Division [Member] | Jun. 30, 2013 Fluids Division [Member] | Jun. 30, 2014 Fluids Division [Member] | Jun. 30, 2013 Fluids Division [Member] | Jun. 30, 2014 Production Testing [Member] | Mar. 31, 2014 Production Testing [Member] | Jun. 30, 2013 Production Testing [Member] | Jun. 30, 2014 Production Testing [Member] | Jun. 30, 2013 Production Testing [Member] | Jun. 30, 2014 Compressco [Member] | Jun. 30, 2013 Compressco [Member] | Jun. 30, 2014 Compressco [Member] | Jun. 30, 2013 Compressco [Member] | Jun. 30, 2014 Production Enhancement Division Eliminations [Member] | Jun. 30, 2013 Production Enhancement Division Eliminations [Member] | Jun. 30, 2014 Production Enhancement Division Eliminations [Member] | Jun. 30, 2013 Production Enhancement Division Eliminations [Member] | Jun. 30, 2014 Total Production Enhancement Division [Member] | Jun. 30, 2013 Total Production Enhancement Division [Member] | Jun. 30, 2014 Total Production Enhancement Division [Member] | Jun. 30, 2013 Total Production Enhancement Division [Member] | Jun. 30, 2014 Offshore Services [Member] | Jun. 30, 2013 Offshore Services [Member] | Jun. 30, 2014 Offshore Services [Member] | Jun. 30, 2013 Offshore Services [Member] | Jun. 30, 2014 Maritech [Member] | Jun. 30, 2013 Maritech [Member] | Jun. 30, 2014 Maritech [Member] | Jun. 30, 2013 Maritech [Member] | Jun. 30, 2014 Offshore Division Eliminations [Member] | Jun. 30, 2013 Offshore Division Eliminations [Member] | Jun. 30, 2014 Offshore Division Eliminations [Member] | Jun. 30, 2013 Offshore Division Eliminations [Member] | Jun. 30, 2014 Total Offshore Division [Member] | Jun. 30, 2013 Total Offshore Division [Member] | Jun. 30, 2014 Total Offshore Division [Member] | Jun. 30, 2013 Total Offshore Division [Member] | Jun. 30, 2014 Intersegment Eliminations [Member] | Jun. 30, 2013 Intersegment Eliminations [Member] | Jun. 30, 2014 Intersegment Eliminations [Member] | Jun. 30, 2013 Intersegment Eliminations [Member] | Jun. 30, 2014 Corporate Overhead [Member] | Jun. 30, 2013 Corporate Overhead [Member] | Jun. 30, 2014 Corporate Overhead [Member] | Jun. 30, 2013 Corporate Overhead [Member]
Industry Segments Details [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product sales | $ 82,871 | $ 79,350 | $ 159,623 | $ 150,888 |  | $ 78,905 | $ 74,741 | $ 152,325 | $ 143,902 |  | $ 0 | $ 0 | $ 0 | $ 0 | $ 2,065 | $ 1,341 | $ 3,902 | $ 2,429 |  |  |  |  | $ 2,065 | $ 1,341 | $ 3,902 | $ 2,429 | $ 354 | $ 1,584 | $ 473 | $ 1,713 | $ 1,547 | $ 1,684 | $ 2,923 | $ 2,844 |  |  |  |  | $ 1,901 | $ 3,268 | $ 3,396 | $ 4,557 |  |  |  |  |  |  |  |
Services and rentals | 159,618 | 141,751 | 295,723 | 278,772 |  | 37,423 | 25,493 | 69,163 | 50,324 | 42,377 |  | 47,433 | 86,015 | 102,040 | 29,950 | 26,640 | 57,877 | 56,377 | (1,085) | (293) | (1,709) | (573) | 71,242 | 73,780 | 142,183 | 157,844 | 55,887 | 62,871 | 91,098 | 100,391 | 0 | 0 | 0 | 0 | (4,934) | (20,393) | (6,721) | (29,787) | 50,953 | 42,478 | 84,377 | 70,604 |  |  |  |  | 0 | 0 | 0 | 0
Intersegment revenues | 0 | 0 | 0 | 0 |  | 322 | (8) | 307 | 40 | 0 |  | 0 | 0 | 0 | 0 | 0 | 0 | 0 |  |  |  |  | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | (322) | 8 | (307) | (40) |  |  |  |
Total revenues | 242,489 | 221,101 | 455,346 | 429,660 |  | 116,650 | 100,226 | 221,795 | 194,266 | 42,377 |  | 47,433 | 86,015 | 102,040 | 32,015 | 27,981 | 61,779 | 58,806 | (1,085) | (293) | (1,709) | (573) | 73,307 | 75,121 | 146,085 | 160,273 | 56,241 | 64,455 | 91,571 | 102,104 | 1,547 | 1,684 | 2,923 | 2,844 | (4,934) | (20,393) | (6,721) | (29,787) | 52,854 | 45,746 | 87,773 | 75,161 | (322) | 8 | (307) | (40) | 0 | 0 | 0 | 0
Income (loss) before taxes | (2,494) | (4,395) | (13,177) | (1,184) |  | 17,059 | 17,847 | 35,536 | 34,852 | (249) |  | 4,317 | (3,047) | 10,615 | 5,477 | 3,161 | 10,664 | 8,386 | 3 | 0 | 6 | 0 | 5,231 | 7,478 | 7,623 | 19,001 | 1,833 | 9,688 | (6,139) | 4,485 | (10,698) | (23,743) | (17,237) | (28,651) | 0 | 0 | 0 | 0 | (8,865) | (14,055) | (23,376) | (24,166) |  |  |  |  | (15,919) | (15,665) | (32,960) | (30,871)
Assets | $ 1,228,266 | $ 1,171,552 | $ 1,228,266 | $ 1,171,552 | $ 1,206,533 | $ 439,793 | $ 389,580 | $ 439,793 | $ 389,580 | $ 333,531 |  | $ 320,801 | $ 333,531 | $ 320,801 | $ 233,956 | $ 233,288 | $ 233,956 | $ 233,288 |  |  |  |  | $ 567,487 | $ 554,089 | $ 567,487 | $ 554,089 | $ 170,663 | $ 181,752 | $ 170,663 | $ 181,752 | $ 20,727 | $ 25,640 | $ 20,727 | $ 25,640 | $ 0 | $ 0 | $ 0 | $ 0 | $ 191,390 | $ 207,392 | $ 191,390 | $ 207,392 |  |  |  |  | $ 29,596 | $ 20,491 | $ 29,596 | $ 20,491

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