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Condensed Consolidating Financial Information (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Debt Instrument [Line Items]                      
Percentage of subsidiary guarantor owned by company (in hundredths)                 100.00%    
Assets:                      
Cash and cash equivalents $ 183,401       $ 304,296       $ 183,401 $ 304,296 $ 198,234
Restricted cash 0       3,673       0 3,673  
Accounts receivable - net 47,647       43,903       47,647 43,903  
Due from affiliates 44,665       51,006       44,665 51,006  
Inventories 171,961       155,908       171,961 155,908  
Prepaid and other assets 40,646       18,292       40,646 18,292  
Total current assets 488,320       577,078       488,320 577,078  
Investment in subsidiaries 0       0       0 0  
Property, plant and equipment - net 1,218,225       1,256,970       1,218,225 1,256,970  
Due from affiliates - less current portion 0       6,054       0 6,054  
Other assets 104,549       82,954       104,549 82,954  
Total 1,811,094 [1]       1,923,056 [1]       1,811,094 [1] 1,923,056 [1] 1,861,750 [1]
Liabilities and shareholders' equity:                      
Accounts payable, trade 86,172       88,004       86,172 88,004  
Due to affiliates 41,904       45,381       41,904 45,381  
Accrued and other current liabilities 40,776       41,495       40,776 41,495  
Accrued employee benefits costs - current portion 16,698       26,682       16,698 26,682  
Convertible senior notes 0       45,483       0 45,483  
Industrial revenue bonds 7,815       7,815       7,815 7,815  
Total current liabilities 193,365       254,860       193,365 254,860  
Senior notes payable 249,512       248,530       249,512 248,530  
Accrued pension benefit costs - less current portion 70,899       37,795       70,899 37,795  
Accrued postretirement benefit costs - less current portion 128,078       103,744       128,078 103,744  
Other liabilities/intercompany loan 40,005       37,612       40,005 37,612  
Deferred taxes - less current portion 90,958       85,999       90,958 85,999  
Total noncurrent liabilities 579,452       513,680       579,452 513,680  
Shareholders' equity:                      
Preferred stock 1       1       1 1  
Common stock 932       928       932 928  
Additional paid-in capital 2,506,842       2,503,907       2,506,842 2,503,907  
Treasury stock, at cost (45,891)       0       (45,891) 0  
Accumulated other comprehensive income (loss) (134,588)       (49,976)       (134,588) (49,976)  
Retained earnings (accumulated deficit) (1,289,019)       (1,300,344)       (1,289,019) (1,300,344)  
Total shareholders' equity 1,038,277       1,154,516       1,038,277 1,154,516  
Total 1,811,094       1,923,056       1,811,094 1,923,056  
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS [Abstract]                      
Third-party customers                 791,993 755,863 668,344
Related parties                 564,431 413,408 230,909
Sales Revenue-net 318,164 [2] 345,646 [3] 366,277 [4] 326,337 [5] 316,851 [6] 279,178 [7] 287,853 [8] 285,389 1,356,424 1,169,271 899,253
Cost of goods sold                 1,266,902 1,056,875 964,918
Gross profit (13,632) [2] 11,324 [3] 49,514 [4] 42,316 [5] 41,135 [6] 15,769 [7] 21,516 [8] 33,976 89,522 112,396 (65,665)
Other operating income - net                 (3,806) (37,386) (16,088)
Selling, general and admin expenses                 46,032 46,802 47,879
Operating income                 47,296 102,980 (97,456)
Interest expense - third party                 (25,129) (25,625) (30,390)
Interest expense - related parties                 0 0 0
Interest income                 338 615 1,297
Interest income - affiliates                 303 448 572
Net loss on forward contracts                 804 (10,495) (19,415)
Other income (expense) - net                 (1,373) (377) (4,751)
Income before taxes and equity in earnings (loss) of subsidiaries and joint ventures                 22,239 67,546 (150,143)
Income tax benefit (expense)                 (14,359) (11,133) 12,357
Income (loss) before equity in earnings (losses) of joint ventures                 7,880 56,413 (137,786)
Equity earnings (loss) of subsidiaries and joint ventures                 3,445 3,558 (68,196)
Net income (loss) (31,107) [2] (6,600) [3] 23,986 [4] 25,046 [5] 65,280 [6] (16,787) [7] 5,146 [8] 6,332 11,325 59,971 (205,982)
Statement of Cash Flows [Abstract]                      
Net cash provided by operating activities                 (2,936) 131,510 39,399
Investing activities:                      
Purchase of property, plant and equipment                 (20,100) (12,241) (16,935)
Nordural expansion                 (12,882) (19,227) (21,981)
Proceeds from sale of property, plant and equipment                 1,471 823 0
Investments in and advances to joint ventures                 (113) (32) (1,044)
Payments received on advances from joint ventures                 3,056 0 1,761
Restricted and other cash deposits                 3,673 5,206 (8,014)
Net cash provided by (used in) investing activities                 (24,895) (25,471) (46,213)
Financing activities:                      
Repayment of debt                 (47,067) 0 0
Borrowing on revolving credit facility                 15,900 0 0
Repayments under revolving credit facility                 (15,900) 0 (25,000)
Repayment of contingent obligation                 (189) 0 0
Repurchase of common stock                 (45,891) 0 0
Financing fees                 0 0 (2,429)
Intercompany transactions                 0 0 0
Issuance of common stock - net                 83 23 103,077
Net cash provided by (used in) financing activities                 (93,064) 23 75,648
Net change in cash and cash equivalents                 (120,895) 106,062 68,834
Cash and cash equivalents, beginning of the period       304,296       198,234 304,296 198,234 129,400
Cash and cash equivalents, end of the period 183,401       304,296       183,401 304,296 198,234
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS [Abstract]                      
Net cash provided by operating activities                 (2,936) 131,510 39,399
Combined Guarantor Subsidiaries [Member]
                      
Assets:                      
Cash and cash equivalents 0       0       0 0 0
Restricted cash         3,673         3,673  
Accounts receivable - net 40,062       31,779       40,062 31,779  
Due from affiliates 616,830       636,511       616,830 636,511  
Inventories 96,197       97,422       96,197 97,422  
Prepaid and other assets 8,668       3,687       8,668 3,687  
Total current assets 761,757       773,072       761,757 773,072  
Investment in subsidiaries 36,965       33,186       36,965 33,186  
Property, plant and equipment - net 338,946       364,760       338,946 364,760  
Due from affiliates - less current portion         0         0  
Other assets 21,870       22,197       21,870 22,197  
Total 1,159,538       1,193,215       1,159,538 1,193,215  
Liabilities and shareholders' equity:                      
Accounts payable, trade 43,215       43,072       43,215 43,072  
Due to affiliates 2,103,687       2,094,293       2,103,687 2,094,293  
Accrued and other current liabilities 10,596       9,187       10,596 9,187  
Accrued employee benefits costs - current portion 14,267       23,592       14,267 23,592  
Convertible senior notes         0         0  
Industrial revenue bonds 7,815       7,815       7,815 7,815  
Total current liabilities 2,179,580       2,177,959       2,179,580 2,177,959  
Senior notes payable 0       0       0 0  
Accrued pension benefit costs - less current portion 40,277       14,096       40,277 14,096  
Accrued postretirement benefit costs - less current portion 122,609       99,469       122,609 99,469  
Other liabilities/intercompany loan 63,369       61,488       63,369 61,488  
Deferred taxes - less current portion 0       0       0 0  
Total noncurrent liabilities 226,255       175,053       226,255 175,053  
Shareholders' equity:                      
Preferred stock 0       0       0 0  
Common stock 60       60       60 60  
Additional paid-in capital 297,300       297,300       297,300 297,300  
Treasury stock, at cost 0               0    
Accumulated other comprehensive income (loss) (132,235)       (60,220)       (132,235) (60,220)  
Retained earnings (accumulated deficit) (1,411,422)       (1,396,937)       (1,411,422) (1,396,937)  
Total shareholders' equity (1,246,297)       (1,159,797)       (1,246,297) (1,159,797)  
Total 1,159,538       1,193,215       1,159,538 1,193,215  
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS [Abstract]                      
Third-party customers                 552,758 468,973 445,096
Related parties                 283,038 247,278 121,230
Sales Revenue-net                 835,796 716,251 566,326
Cost of goods sold                 866,366 708,835 663,124
Gross profit                 (30,570) 7,416 (96,798)
Other operating income - net                 (3,806) (37,386) (16,088)
Selling, general and admin expenses                 39,100 38,719 44,053
Operating income                 (65,864) 6,083 (124,763)
Interest expense - third party                 (25,129) (25,625) (30,390)
Interest expense - related parties                 68,174 66,549 61,578
Interest income                 54 148 714
Interest income - affiliates                 0 0 0
Net loss on forward contracts                 804 (10,495) (17,714)
Other income (expense) - net                 (806) 932 (4,255)
Income before taxes and equity in earnings (loss) of subsidiaries and joint ventures                 (22,767) 37,592 (114,830)
Income tax benefit (expense)                 4,484 12,670 26,756
Income (loss) before equity in earnings (losses) of joint ventures                 (18,283) 50,262 (88,074)
Equity earnings (loss) of subsidiaries and joint ventures                 3,798 1,246 (45,377)
Net income (loss)                 (14,485) 51,508 (133,451)
Statement of Cash Flows [Abstract]                      
Net cash provided by operating activities                 (10,187) 100,137 78,476
Investing activities:                      
Purchase of property, plant and equipment                 (8,451) (3,286) (10,241)
Nordural expansion                 0 0 0
Proceeds from sale of property, plant and equipment                 1,415 808  
Investments in and advances to joint ventures                 0 0 0
Payments received on advances from joint ventures                 0   0
Restricted and other cash deposits                 3,673 5,206 (8,014)
Net cash provided by (used in) investing activities                 (3,363) 2,728 (18,255)
Financing activities:                      
Repayment of debt                 0    
Borrowing on revolving credit facility                 0    
Repayments under revolving credit facility                 0   0
Repayment of contingent obligation                 (189)    
Repurchase of common stock                 0    
Financing fees                 0   0
Intercompany transactions                 13,739 (102,865) (60,221)
Issuance of common stock - net                   0 0
Net cash provided by (used in) financing activities                 13,550 (102,865) (60,221)
Net change in cash and cash equivalents                 0 0 0
Cash and cash equivalents, beginning of the period       0       0 0 0 0
Cash and cash equivalents, end of the period 0       0       0 0 0
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS [Abstract]                      
Net cash provided by operating activities                 (10,187) 100,137 78,476
Non-Guarantor Subsidiaries [Member]
                      
Assets:                      
Cash and cash equivalents 159,157       214,923       159,157 214,923 109,798
Restricted cash         0         0  
Accounts receivable - net 7,585       12,124       7,585 12,124  
Due from affiliates 13,517       7,148       13,517 7,148  
Inventories 75,764       58,486       75,764 58,486  
Prepaid and other assets 38,809       39,453       38,809 39,453  
Total current assets 294,832       332,134       294,832 332,134  
Investment in subsidiaries 0       0       0 0  
Property, plant and equipment - net 878,333       890,924       878,333 890,924  
Due from affiliates - less current portion         6,054         6,054  
Other assets 43,269       36,735       43,269 36,735  
Total 1,216,434       1,265,847       1,216,434 1,265,847  
Liabilities and shareholders' equity:                      
Accounts payable, trade 42,278       44,629       42,278 44,629  
Due to affiliates 78,411       70,580       78,411 70,580  
Accrued and other current liabilities 29,822       44,932       29,822 44,932  
Accrued employee benefits costs - current portion 0       0       0 0  
Convertible senior notes         0         0  
Industrial revenue bonds 0       0       0 0  
Total current liabilities 150,511       160,141       150,511 160,141  
Senior notes payable 0       0       0 0  
Accrued pension benefit costs - less current portion 0       0       0 0  
Accrued postretirement benefit costs - less current portion 0       0       0 0  
Other liabilities/intercompany loan 686,834       756,208       686,834 756,208  
Deferred taxes - less current portion 90,958       90,822       90,958 90,822  
Total noncurrent liabilities 777,792       847,030       777,792 847,030  
Shareholders' equity:                      
Preferred stock 0       0       0 0  
Common stock 12       12       12 12  
Additional paid-in capital 144,383       144,383       144,383 144,383  
Treasury stock, at cost 0               0    
Accumulated other comprehensive income (loss) (1,373)       (1,220)       (1,373) (1,220)  
Retained earnings (accumulated deficit) 145,109       115,501       145,109 115,501  
Total shareholders' equity 288,131       258,676       288,131 258,676  
Total 1,216,434       1,265,847       1,216,434 1,265,847  
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS [Abstract]                      
Third-party customers                 239,235 286,890 223,248
Related parties                 281,393 166,130 109,679
Sales Revenue-net                 520,628 453,020 332,927
Cost of goods sold                 400,536 348,040 302,413
Gross profit                 120,092 104,980 30,514
Other operating income - net                 0 0 0
Selling, general and admin expenses                 6,932 8,083 3,826
Operating income                 113,160 96,897 26,688
Interest expense - third party                 0 0 0
Interest expense - related parties                 (68,174) (66,549) (61,578)
Interest income                 284 467 583
Interest income - affiliates                 303 448 572
Net loss on forward contracts                 0 0 (1,701)
Other income (expense) - net                 (567) (1,309) (496)
Income before taxes and equity in earnings (loss) of subsidiaries and joint ventures                 45,006 29,954 (35,932)
Income tax benefit (expense)                 (18,843) (23,803) (14,399)
Income (loss) before equity in earnings (losses) of joint ventures                 26,163 6,151 (50,331)
Equity earnings (loss) of subsidiaries and joint ventures                 3,445 3,558 (19,896)
Net income (loss)                 29,608 9,709 (70,227)
Statement of Cash Flows [Abstract]                      
Net cash provided by operating activities                 7,251 31,373 (39,077)
Investing activities:                      
Purchase of property, plant and equipment                 (11,199) (8,767) (5,389)
Nordural expansion                 (12,882) (19,227) (21,981)
Proceeds from sale of property, plant and equipment                 56 15  
Investments in and advances to joint ventures                 0 0 0
Payments received on advances from joint ventures                 0   0
Restricted and other cash deposits                 0 0 0
Net cash provided by (used in) investing activities                 (24,025) (27,979) (27,370)
Financing activities:                      
Repayment of debt                 0    
Borrowing on revolving credit facility                 0    
Repayments under revolving credit facility                 0   0
Repayment of contingent obligation                 0    
Repurchase of common stock                 0    
Financing fees                 0   0
Intercompany transactions                 (38,992) 101,731 104,700
Issuance of common stock - net                   0 0
Net cash provided by (used in) financing activities                 (38,992) 101,731 104,700
Net change in cash and cash equivalents                 (55,766) 105,125 38,253
Cash and cash equivalents, beginning of the period       214,923       109,798 214,923 109,798 71,545
Cash and cash equivalents, end of the period 159,157       214,923       159,157 214,923 109,798
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS [Abstract]                      
Net cash provided by operating activities                 7,251 31,373 (39,077)
Century Aluminum Company [Member]
                      
Assets:                      
Cash and cash equivalents 24,244       89,373       24,244 89,373 88,436
Restricted cash         0         0  
Accounts receivable - net 0       0       0 0  
Due from affiliates 2,474,727       2,537,945       2,474,727 2,537,945  
Inventories 0       0       0 0  
Prepaid and other assets 3,169       2,152       3,169 2,152  
Total current assets 2,502,140       2,629,470       2,502,140 2,629,470  
Investment in subsidiaries (995,131)       (934,307)       (995,131) (934,307)  
Property, plant and equipment - net 1,211       1,451       1,211 1,451  
Due from affiliates - less current portion         0         0  
Other assets 39,410       24,022       39,410 24,022  
Total 1,547,630       1,720,636       1,547,630 1,720,636  
Liabilities and shareholders' equity:                      
Accounts payable, trade 679       303       679 303  
Due to affiliates 205,651       222,245       205,651 222,245  
Accrued and other current liabilities 10,358       14,376       10,358 14,376  
Accrued employee benefits costs - current portion 2,431       3,090       2,431 3,090  
Convertible senior notes         45,483         45,483  
Industrial revenue bonds 0       0       0 0  
Total current liabilities 219,119       285,497       219,119 285,497  
Senior notes payable 249,512       248,530       249,512 248,530  
Accrued pension benefit costs - less current portion 30,622       23,699       30,622 23,699  
Accrued postretirement benefit costs - less current portion 5,469       4,275       5,469 4,275  
Other liabilities/intercompany loan 4,631       4,119       4,631 4,119  
Deferred taxes - less current portion 0       0       0 0  
Total noncurrent liabilities 290,234       280,623       290,234 280,623  
Shareholders' equity:                      
Preferred stock 1       1       1 1  
Common stock 932       928       932 928  
Additional paid-in capital 2,506,842       2,503,907       2,506,842 2,503,907  
Treasury stock, at cost (45,891)               (45,891)    
Accumulated other comprehensive income (loss) (134,588)       (49,976)       (134,588) (49,976)  
Retained earnings (accumulated deficit) (1,289,019)       (1,300,344)       (1,289,019) (1,300,344)  
Total shareholders' equity 1,038,277       1,154,516       1,038,277 1,154,516  
Total 1,547,630       1,720,636       1,547,630 1,720,636  
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS [Abstract]                      
Third-party customers                 0 0 0
Related parties                 0 0 0
Sales Revenue-net                 0 0 0
Cost of goods sold                 0 0 0
Gross profit                 0 0 0
Other operating income - net                 0 0 0
Selling, general and admin expenses                 0 0 0
Operating income                 0 0 0
Interest expense - third party                 0 0 0
Interest expense - related parties                 0 0 0
Interest income                 0 0 0
Interest income - affiliates                 0 0 0
Net loss on forward contracts                 0 0 0
Other income (expense) - net                 0 0 0
Income before taxes and equity in earnings (loss) of subsidiaries and joint ventures                 0 0 0
Income tax benefit (expense)                 0 0 0
Income (loss) before equity in earnings (losses) of joint ventures                 0 0 0
Equity earnings (loss) of subsidiaries and joint ventures                 11,325 59,971 (205,982)
Net income (loss)                 11,325 59,971 (205,982)
Statement of Cash Flows [Abstract]                      
Net cash provided by operating activities                 0 0 0
Investing activities:                      
Purchase of property, plant and equipment                 (450) (188) (1,305)
Nordural expansion                 0 0 0
Proceeds from sale of property, plant and equipment                 0 0  
Investments in and advances to joint ventures                 (113) (32) (1,044)
Payments received on advances from joint ventures                 3,056   1,761
Restricted and other cash deposits                 0 0 0
Net cash provided by (used in) investing activities                 2,493 (220) (588)
Financing activities:                      
Repayment of debt                 (47,067)    
Borrowing on revolving credit facility                 15,900    
Repayments under revolving credit facility                 (15,900)   (25,000)
Repayment of contingent obligation                 0    
Repurchase of common stock                 (45,891)    
Financing fees                 0   (2,429)
Intercompany transactions                 25,253 1,134 (44,479)
Issuance of common stock - net                 83 23 103,077
Net cash provided by (used in) financing activities                 (67,622) 1,157 31,169
Net change in cash and cash equivalents                 (65,129) 937 30,581
Cash and cash equivalents, beginning of the period       89,373       88,436 89,373 88,436 57,855
Cash and cash equivalents, end of the period 24,244       89,373       24,244 89,373 88,436
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS [Abstract]                      
Net cash provided by operating activities                 0 0 0
Reclassifications and Eliminations [Member]
                      
Assets:                      
Cash and cash equivalents 0       0       0 0  
Restricted cash         0         0  
Accounts receivable - net 0       0       0 0  
Due from affiliates (3,060,409)       (3,130,598)       (3,060,409) (3,130,598)  
Inventories 0       0       0 0  
Prepaid and other assets (10,000)       (27,000)       (10,000) (27,000)  
Total current assets (3,070,409)       (3,157,598)       (3,070,409) (3,157,598)  
Investment in subsidiaries 958,166       901,121       958,166 901,121  
Property, plant and equipment - net (265)       (165)       (265) (165)  
Due from affiliates - less current portion         0         0  
Other assets 0       0       0 0  
Total (2,112,508)       (2,256,642)       (2,112,508) (2,256,642)  
Liabilities and shareholders' equity:                      
Accounts payable, trade 0       0       0 0  
Due to affiliates (2,345,845)       (2,341,737)       (2,345,845) (2,341,737)  
Accrued and other current liabilities (10,000)       (27,000)       (10,000) (27,000)  
Accrued employee benefits costs - current portion 0       0       0 0  
Convertible senior notes         0         0  
Industrial revenue bonds 0       0       0 0  
Total current liabilities (2,355,845)       (2,368,737)       (2,355,845) (2,368,737)  
Senior notes payable 0       0       0 0  
Accrued pension benefit costs - less current portion 0       0       0 0  
Accrued postretirement benefit costs - less current portion 0       0       0 0  
Other liabilities/intercompany loan (714,829)       (784,203)       (714,829) (784,203)  
Deferred taxes - less current portion 0       (4,823)       0 (4,823)  
Total noncurrent liabilities (714,829)       (789,026)       (714,829) (789,026)  
Shareholders' equity:                      
Preferred stock 0       0       0 0  
Common stock (72)       (72)       (72) (72)  
Additional paid-in capital (441,683)       (441,683)       (441,683) (441,683)  
Treasury stock, at cost 0               0    
Accumulated other comprehensive income (loss) 133,608       61,440       133,608 61,440  
Retained earnings (accumulated deficit) 1,266,313       1,281,436       1,266,313 1,281,436  
Total shareholders' equity 958,166       901,121       958,166 901,121  
Total (2,112,508)       (2,256,642)       (2,112,508) (2,256,642)  
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS [Abstract]                      
Third-party customers                 0 0 0
Related parties                 0 0 0
Sales Revenue-net                 0 0 0
Cost of goods sold                 0 0 (619)
Gross profit                 0 0 619
Other operating income - net                 0 0 0
Selling, general and admin expenses                 0 0 0
Operating income                 0 0 619
Interest expense - third party                 0 0 0
Interest expense - related parties                 0 0 0
Interest income                 0 0 0
Interest income - affiliates                 0 0 0
Net loss on forward contracts                 0 0 0
Other income (expense) - net                 0 0 0
Income before taxes and equity in earnings (loss) of subsidiaries and joint ventures                 0 0 619
Income tax benefit (expense)                 0 0 0
Income (loss) before equity in earnings (losses) of joint ventures                 0 0 619
Equity earnings (loss) of subsidiaries and joint ventures                 (15,123) (61,217) 203,059
Net income (loss)                 (15,123) (61,217) 203,678
Financing activities:                      
Cash and cash equivalents, beginning of the period       0         0    
Cash and cash equivalents, end of the period $ 0       $ 0       $ 0 $ 0  
Senior secured notes due May 15, 2014 [Member]
                      
Debt Instrument [Line Items]                      
Interest rate (in hundredths) 8.00%               8.00%    
Senior unsecured notes due August 15, 2014 [Member]
                      
Debt Instrument [Line Items]                      
Interest rate (in hundredths) 7.50%               7.50%    
Convertible senior notes due 2024 [Member]
                      
Debt Instrument [Line Items]                      
Interest rate (in hundredths) 1.75%               1.75%    
[1] Segment assets include cash and cash equivalents, accounts receivable, due from affiliates, prepaid and other current assets, inventory, intangible assets and property, plant and equipment-net; the remaining assets are unallocated corporate assets.
[2] The fourth quarter of 2011 net loss includes benefit of $3,067 for mark-to-market gains primarily related to primary aluminum price protection options and a $6,303 charge for lower of cost or market inventory adjustments.
[3] The third quarter of 2011 net loss includes a benefit of $4,163 for mark-to-market gains primarily related to primary aluminum price protection options and a $13,479 charge for lower of cost or market inventory adjustments.
[4] The second quarter of 2011 net income includes a benefit of $8,953 for changes to the Century of West Virginia retiree medical benefits program, a $7,707 charge related to the contractual impact of recent changes in the composition of our Board of Directors and executive management team and a $2,889 charge related to an insurance claim receivable.
[5] The first quarter of 2011 net income includes a charge of $4,809 for mark-to-market losses primarily related to primary aluminum price protection options, a benefit of $9,418 for changes to the Century of West Virginia retiree medical benefits program and a $6,462 charge for the restart of the curtailed potline at Hawesville.
[6] The fourth quarter of 2010 net income includes a benefit of $56,728 for changes to the Century of West Virginia retiree medical benefits program, a charge of $5,681 for mark-to-market losses for primary aluminum price protection options and a charge for contractual termination pension benefits of $4,555 due to the continued curtailment of the Ravenswood facility.
[7] The third quarter of 2010 net loss includes a charge of $12,136 for mark-to-market losses primarily related to primary aluminum price protection options and a $7,300 benefit for lower of cost or market inventory adjustments.
[8] The second quarter of 2010 net income includes a charge of $9,294 for mark-to-market losses primarily related to primary aluminum price protection options and a $7,056 charge for lower of cost or market inventory adjustments.