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Condensed Consolidated Guarantor And Non-Guarantor Financial Information (Schedule Of Condensed Consolidating Statements Of Operations) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Net revenues | $ 201,696 | [1] | $ 217,110 | [1] | $ 197,461 | [1] | $ 229,842 | [1] | $ 200,113 | [2] | $ 213,278 | [2] | $ 165,861 | [2] | $ 122,748 | [2] | $ 846,109 | $ 702,000 | $ 774,469
Cost of sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 796,194 | 552,317 | 609,652
Gross profit | (108,925) | [3] | 57,919 | [3] | 28,438 | [3] | 72,483 | [3] | 26,273 | [4] | 64,972 | [4] | 44,043 | [4] | 14,395 | [4] | 49,915 | 149,683 | 164,817
Goodwill impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (16,743)
Gain (loss) on sale of assets, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (13,476) | (6) | 9,118
Non-hedge loss on commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (10,507) |  |
Selling, general and administrative expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (94,415) | (86,637) | (106,113)
Income (loss) from operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (68,483) | 63,040 | 51,079
Equity in earnings of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,434 | 22,215 | 19,469
Other than temporary loss on equity investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (10,563) | (2,240)
Net interest expense and other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (65,912) | (73,642) | (66,638)
Income (loss) before income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (125,961) | 1,050 | 1,670
Income tax provision (benefit) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (59,158) | (36,806) | 19,166
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest, Total |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (66,803) | 37,856 | (17,496)
Income (loss) from discontinued operations, net of tax | (71,888) | [5] | 4,503 | [5] | 42,216 | [5] | 48,853 | [5] | (734) |  | 30,017 |  | 30,766 |  | 35,172 |  | 23,684 | 95,221 | (106,657)
Net income (loss), including noncontrolling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (43,119) | 133,077 | (124,153)
Less net income applicable to noncontrolling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (3,178) | (3,098) | (2,835)
Preferred stock dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (37) | (40) | (114)
Net income (loss) applicable to Helix common shareholders | (171,567) |  | 14,865 |  | 44,641 |  | 65,727 |  | 16,753 |  | 46,016 |  | 41,313 |  | 25,857 |  | (46,334) | 129,939 | (127,102)
Total comprehensive income (loss) applicable to Helix common shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (51,984) | 158,980 | (143,919)
Helix [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 90,552 | 84,748 | 183,147
Cost of sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 111,531 | 72,902 | 124,722
Gross profit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (20,979) | 11,846 | 58,425
Gain (loss) on sale of assets, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (6) | 3,159
Selling, general and administrative expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (53,539) | (74,205) | (67,165)
Income (loss) from operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (74,518) | (62,365) | (5,581)
Equity in earnings of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (12,264) | 262,990 | (60,443)
Other than temporary loss on equity investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (2,240)
Net interest expense and other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (59,759) | (157,546) | (59,522)
Income (loss) before income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (146,541) | 43,079 | (127,786)
Income tax provision (benefit) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (96,328) | (63,242) | (9,175)
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest, Total |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (50,213) | 106,321 | (118,611)
Income (loss) from discontinued operations, net of tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,621) |  |
Net income (loss), including noncontrolling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (51,834) | 106,321 | (118,611)
Preferred stock dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (37) | (40) | (114)
Net income (loss) applicable to Helix common shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (51,871) | 106,281 | (118,725)
Total comprehensive income (loss) applicable to Helix common shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (51,952) | 107,575 | (119,051)
Guarantors [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 404,628 | 362,648 | 376,134
Cost of sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 444,956 | 281,267 | 287,709
Gross profit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (40,328) | 81,381 | 88,425
Gain (loss) on sale of assets, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (13,475) |  |
Non-hedge loss on commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (10,507) |  |
Selling, general and administrative expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (22,782) | (25,963) | (18,268)
Income (loss) from operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (87,092) | 55,418 | 70,157
Equity in earnings of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 16,222 | 7,340 | 8,473
Net interest expense and other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 392 | (6,787) | (1,991)
Income (loss) before income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (70,478) | 55,971 | 76,639
Income tax provision (benefit) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 24,186 | 18,181 | 23,465
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest, Total |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (94,664) | 37,790 | 53,174
Income (loss) from discontinued operations, net of tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25,305 | 95,221 | (106,657)
Net income (loss), including noncontrolling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (69,359) | 133,011 | (53,483)
Net income (loss) applicable to Helix common shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (69,359) | 133,011 | (53,483)
Total comprehensive income (loss) applicable to Helix common shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (82,219) | 161,760 | (59,969)
Non-Guarantors [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 464,331 | 367,114 | 334,726
Cost of sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 351,283 | 309,429 | 302,051
Gross profit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 113,048 | 57,685 | 32,675
Goodwill impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (16,743)
Gain (loss) on sale of assets, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1) |  | 5,959
Selling, general and administrative expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (20,018) | 12,101 | (22,482)
Income (loss) from operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 93,029 | 69,786 | (591)
Equity in earnings of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,434 | 22,215 | 19,469
Other than temporary loss on equity investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (10,563) |
Net interest expense and other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (6,517) | 67,181 | (5,125)
Income (loss) before income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 94,946 | 148,619 | 13,753
Income tax provision (benefit) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,951 | 8,186 | 9,405
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest, Total |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 81,995 | 140,433 | 4,348
Net income (loss), including noncontrolling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 81,995 | 140,433 | 4,348
Net income (loss) applicable to Helix common shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 81,995 | 140,433 | 4,348
Total comprehensive income (loss) applicable to Helix common shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 89,260 | 140,214 | (5,653)
Consolidating Entries [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (113,402) | (112,510) | (119,538)
Cost of sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (111,576) | (111,281) | (104,830)
Gross profit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,826) | (1,229) | (14,708)
Selling, general and administrative expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,924 | 1,430 | 1,802
Income (loss) from operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 98 | 201 | (12,906)
Equity in earnings of investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (3,958) | (270,330) | 51,970
Net interest expense and other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (28) | 23,510 |
Income (loss) before income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (3,888) | (246,619) | 39,064
Income tax provision (benefit) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 33 | 69 | (4,529)
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest, Total |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (3,921) | (246,688) | 43,593
Net income (loss), including noncontrolling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (3,921) | (246,688) | 43,593
Less net income applicable to noncontrolling interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (3,178) | (3,098) | (2,835)
Net income (loss) applicable to Helix common shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (7,099) | (249,786) | 40,758
Total comprehensive income (loss) applicable to Helix common shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (7,073) | $ (250,569) | $ 40,754
[1] | Excludes revenues from discontinued operations of $178.1 million, $149.9 million, $119.1 million and $110.1 million for the quarters ended March 31, June 30, September 30 and December 31, 2012.
[2] | Excludes revenues from discontinued operations of $168.9 million, $172.5 million, $159.2 million and $196.1 million for the quarters ended March 31, June 30, September 30 and December 31, 2011.
[3] | Excludes gross profit (loss) from discontinued operations of $89.2 million, $64.8 million, $27.8 million and $(102.6) million for the quarters ended March 31, June 30, September 30 and December 31, 2012. Includes impairment charges totaling $14.6 million in the second quarter of 2012, $4.6 million in the third quarter of 2012 and $158.0 million in the fourth quarter of 2012 (Note 2).
[4] | Excludes gross profit from discontinued operations of $62.7 million, $56.2 million, $57.3 million and $4.8 million for the quarters ended March 31, June 30, September 30 and December 31, 2011. The fourth quarter includes a $6.6 million impairment charge to reduce our Australian well intervention equipment to its estimated fair value at December 31, 2011.
[5] | Our net loss in the fourth quarter of 2012 includes a $138.6 million impairment charge associated with the sale of ERT (Note 3).

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