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Condensed consolidating financial information | 3 Months Ended | 12 Months Ended
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Mar. 31, 2017 | Dec. 31, 2016
Condensed Financial Information of Parent Company Only Disclosure [Abstract] |  |
Condensed consolidating financial information | Condensed consolidating financial information Our 2021 Notes are guaranteed by each of our material existing and future domestic subsidiaries (The "Guarantor Subsidiaries"), except for Nordural US LLC, Century Aluminum Development LLC and Century Aluminum of West Virginia, Inc. The Guarantor Subsidiaries are 100% owned by Century. All guarantees are full and unconditional; all guarantees are joint and several. These notes are not guaranteed by our foreign subsidiaries (such foreign subsidiaries along with Nordural US LLC, Century Aluminum Development LLC and Century Aluminum of West Virginia, Inc., collectively the “Non-Guarantor Subsidiaries”). We allocate corporate expenses or income to our subsidiaries and charge interest on certain intercompany balances. The following summarized condensed consolidating statements of comprehensive income (loss) for three months ended March 31, 2017 and 2016, condensed consolidating balance sheets as of March 31, 2017 and December 31, 2016 and the condensed consolidating statements of cash flows for the three months ended March 31, 2017 and 2016 present separate results for Century, the Guarantor Subsidiaries, the Non-Guarantor Subsidiaries, consolidating adjustments and total consolidated amounts.
Condensed Consolidating Statements of Comprehensive Income (Loss)
For the three months ended March 31, 2017
|  | The Company |  | Combined Guarantor Subsidiaries |  | Combined Non-Guarantor Subsidiaries |  | Consolidating Adjustments |  | Total Consolidated
NET SALES: |  |  |  |  |  |  |  |  |  |
Related parties |  | $ | — |  |  | $ | 131,068 |  |  | $ | 149,505 |  |  | $ | — |  |  | $ | 280,573 |
Other customers |  | — |  |  | 85,183 |  |  | 30 |  |  | — |  |  | 85,213 |
Total net sales |  | — |  |  | 216,251 |  |  | 149,535 |  |  | — |  |  | 365,786 |
Cost of goods sold |  | — |  |  | 213,751 |  |  | 135,184 |  |  | — |  |  | 348,935 |
Gross profit |  | — |  |  | 2,500 |  |  | 14,351 |  |  | — |  |  | 16,851 |
Selling, general and administrative expenses |  | 10,200 |  |  | — |  |  | 502 |  |  | — |  |  | 10,702 |
Other operating expense - net |  | — |  |  | — |  |  | 973 |  |  | — |  |  | 973 |
Operating income (loss) |  | (10,200 | ) |  | 2,500 |  |  | 12,876 |  |  | — |  |  | 5,176 |
Interest expense |  | (5,148 | ) |  | (379 | ) |  | (44 | ) |  | — |  |  | (5,571 | )
Interest income (expense) - affiliates |  | 8,982 |  |  | 2,081 |  |  | (11,063 | ) |  | — |  |  | — |
Interest income |  | 80 |  |  | — |  |  | 150 |  |  | — |  |  | 230 |
Net loss on forward and derivative contracts |  | — |  |  | (15,847 | ) |  | (290 | ) |  | — |  |  | (16,137 | )
Other income (expense) - net |  | 787 |  |  | 47 |  |  | (450 | ) |  | — |  |  | 384 |
Income (loss) before income taxes and equity in earnings (loss) of subsidiaries and joint ventures |  | (5,499 | ) |  | (11,598 | ) |  | 1,179 |  |  | — |  |  | (15,918 | )
Income tax benefit (expense) |  | 571 |  |  | 493 |  |  | (756 | ) |  | — |  |  | 308 |
Income (loss) before equity in earnings (loss) of subsidiaries and joint ventures |  | (4,928 | ) |  | (11,105 | ) |  | 423 |  |  | — |  |  | (15,610 | )
Equity in earnings (loss) of subsidiaries and joint ventures |  | (10,211 | ) |  | 853 |  |  | 471 |  |  | 9,358 |  |  | 471 |
Net income (loss) |  | $ | (15,139 | ) |  | $ | (10,252 | ) |  | $ | 894 |  |  | $ | 9,358 |  |  | $ | (15,139 | )
Other comprehensive income before income tax effect |  | 1,786 |  |  | 1,306 |  |  | 348 |  |  | (1,654 | ) |  | 1,786 |
Income tax effect |  | (1,074 | ) |  | — |  |  | 8 |  |  | (8 | ) |  | (1,074 | )
Other comprehensive income |  | 712 |  |  | 1,306 |  |  | 356 |  |  | (1,662 | ) |  | 712 |
Total comprehensive income (loss) |  | $ | (14,427 | ) |  | $ | (8,946 | ) |  | $ | 1,250 |  |  | $ | 7,696 |  |  | $ | (14,427 | )
Condensed Consolidating Statements of Comprehensive Income (Loss)
For the three months ended March 31, 2016
|  | The Company |  | Combined Guarantor Subsidiaries |  | Combined Non-Guarantor Subsidiaries |  | Consolidating Adjustments |  | Total Consolidated
NET SALES: |  |  |  |  |  |  |  |  |  |
Related parties |  | $ | — |  |  | $ | 162,120 |  |  | $ | 141,654 |  |  | $ | (23,397 | ) |  | $ | 280,377 |
Third-party customers |  | — |  |  | 38,468 |  |  | 9 |  |  | — |  |  | 38,477 |
Total net sales |  | — |  |  | 200,588 |  |  | 141,663 |  |  | (23,397 | ) |  | 318,854 |
Cost of goods sold |  | — |  |  | 209,573 |  |  | 136,304 |  |  | (23,971 | ) |  | 321,906 |
Gross profit (loss) |  | — |  |  | (8,985 | ) |  | 5,359 |  |  | 574 |  |  | (3,052 | )
Selling, general and administrative expenses |  | 8,299 |  |  | — |  |  | 1,326 |  |  | — |  |  | 9,625 |
Other operating expense - net |  | — |  |  | — |  |  | 881 |  |  | — |  |  | 881 |
Operating income (loss) |  | (8,299 | ) |  | (8,985 | ) |  | 3,152 |  |  | 574 |  |  | (13,558 | )
Interest expense |  | (5,065 | ) |  | (382 | ) |  | (46 | ) |  | — |  |  | (5,493 | )
Interest income (expense) - affiliates |  | 9,548 |  |  | — |  |  | (9,548 | ) |  | — |  |  | — |
Interest income |  | 37 |  |  | — |  |  | 77 |  |  | — |  |  | 114 |
Net gain on forward and derivative contracts |  | — |  |  | 353 |  |  | — |  |  | — |  |  | 353 |
Other income (expense) - net |  | 771 |  |  | (6 | ) |  | (771 | ) |  | — |  |  | (6 | )
Loss before income taxes and equity in earnings (loss) of subsidiaries and joint ventures |  | (3,008 | ) |  | (9,020 | ) |  | (7,136 | ) |  | 574 |  |  | (18,590 | )
Income tax benefit |  | 620 |  |  | — |  |  | 1,450 |  |  | — |  |  | 2,070 |
Loss before equity in earnings (loss) of subsidiaries and joint ventures |  | (2,388 | ) |  | (9,020 | ) |  | (5,686 | ) |  | 574 |  |  | (16,520 | )
Equity in earnings (loss) of subsidiaries and joint ventures |  | (13,775 | ) |  | — |  |  | 357 |  |  | 13,775 |  |  | 357 |
Net loss |  | $ | (16,163 | ) |  | $ | (9,020 | ) |  | $ | (5,329 | ) |  | $ | 14,349 |  |  | $ | (16,163 | )
Other comprehensive income before income tax effect |  | 1,206 |  |  | 778 |  |  | 303 |  |  | (1,081 | ) |  | 1,206 |
Income tax effect |  | (383 | ) |  | — |  |  | 8 |  |  | (8 | ) |  | (383 | )
Other comprehensive income |  | 823 |  |  | 778 |  |  | 311 |  |  | (1,089 | ) |  | 823 |
Total comprehensive loss |  | $ | (15,340 | ) |  | $ | (8,242 | ) |  | $ | (5,018 | ) |  | $ | 13,260 |  |  | $ | (15,340 | )
Condensed Consolidating Balance Sheet
As of March 31, 2017
|  | The Company |  | Combined Guarantor Subsidiaries |  | Combined Non-Guarantor Subsidiaries |  | Consolidating Adjustments |  | Total Consolidated
Cash & cash equivalents |  | $ | 39,218 |  |  | $ | (24 | ) |  | $ | 86,701 |  |  | $ | — |  |  | $ | 125,895 |
Restricted cash |  | — |  |  | 797 |  |  | — |  |  | — |  |  | 797 |
Accounts receivable - net |  | — |  |  | 35,999 |  |  | 226 |  |  | — |  |  | 36,225 |
Due from affiliates |  | 42 |  |  | 11,747 |  |  | — |  |  | — |  |  | 11,789 |
Inventories |  | 180 |  |  | 155,056 |  |  | 89,484 |  |  | — |  |  | 244,720 |
Prepaid and other current assets |  | 6,909 |  |  | 2,795 |  |  | 9,264 |  |  | — |  |  | 18,968 |
Total current assets |  | 46,349 |  |  | 206,370 |  |  | 185,675 |  |  | — |  |  | 438,394 |
Property, plant and equipment - net |  | 14,379 |  |  | 320,527 |  |  | 677,658 |  |  | — |  |  | 1,012,564 |
Investment in subsidiaries |  | 693,468 |  |  | 52,093 |  |  | — |  |  | (745,561 | ) |  | — |
Due from affiliates - long term |  | 511,577 |  |  | 325,392 |  |  | 14,199 |  |  | (851,168 | ) |  | — |
Other assets |  | 28,754 |  |  | 49,249 |  |  | 28,637 |  |  | (31,791 | ) |  | 74,849 |
TOTAL |  | $ | 1,294,527 |  |  | $ | 953,631 |  |  | $ | 906,169 |  |  | $ | (1,628,520 | ) |  | $ | 1,525,807 |
Accounts payable, trade |  | $ | 4,404 |  |  | $ | 49,249 |  |  | $ | 35,048 |  |  | $ | — |  |  | $ | 88,701 |
Due to affiliates |  | 2,637 |  |  | 11,475 |  |  | 5,908 |  |  | — |  |  | 20,020 |
Accrued and other current liabilities |  | 13,825 |  |  | 24,422 |  |  | 19,847 |  |  | — |  |  | 58,094 |
Accrued employee benefits costs |  | 1,932 |  |  | 8,314 |  |  | 668 |  |  | — |  |  | 10,914 |
Industrial revenue bonds |  | — |  |  | 7,815 |  |  | — |  |  | — |  |  | 7,815 |
Total current liabilities |  | 22,798 |  |  | 101,275 |  |  | 61,471 |  |  | — |  |  | 185,544 |
Senior notes payable |  | 247,809 |  |  | — |  |  | — |  |  | — |  |  | 247,809 |
Accrued pension benefits costs cost - less current portion |  | 46,136 |  |  | 20,211 |  |  | 14,307 |  |  | (31,791 | ) |  | 48,863 |
Accrued postretirement benefits costs - less current portion |  | 4,476 |  |  | 120,502 |  |  | 1,751 |  |  | — |  |  | 126,729 |
Other liabilities |  | 4,499 |  |  | 31,146 |  |  | 28,963 |  |  | — |  |  | 64,608 |
Due to affiliates - long term |  | 226,065 |  |  | 43,364 |  |  | 581,739 |  |  | (851,168 | ) |  | — |
Deferred taxes |  | — |  |  | 2,735 |  |  | 106,775 |  |  | — |  |  | 109,510 |
Total noncurrent liabilities |  | 528,985 |  |  | 217,958 |  |  | 733,535 |  |  | (882,959 | ) |  | 597,519 |
Preferred stock |  | 1 |  |  | — |  |  | — |  |  | — |  |  | 1 |
Common stock |  | 944 |  |  | 1 |  |  | 59 |  |  | (60 | ) |  | 944 |
Other shareholder's equity |  | 741,799 |  |  | 634,397 |  |  | 111,104 |  |  | (745,501 | ) |  | 741,799 |
Total shareholder's equity |  | 742,744 |  |  | 634,398 |  |  | 111,163 |  |  | (745,561 | ) |  | 742,744 |
TOTAL |  | $ | 1,294,527 |  |  | $ | 953,631 |  |  | $ | 906,169 |  |  | $ | (1,628,520 | ) |  | $ | 1,525,807 |
Condensed Consolidating Balance Sheet
As of December 31, 2016
|  | The Company |  | Combined Guarantor Subsidiaries |  | Combined Non-Guarantor Subsidiaries |  | Consolidating Adjustments |  | Total Consolidated
Cash & cash equivalents |  | $ | 36,670 |  |  | $ | (255 | ) |  | $ | 95,988 |  |  | $ | — |  |  | $ | 132,403 |
Restricted cash |  | — |  |  | 794 |  |  | 256 |  |  | — |  |  | 1,050 |
Accounts receivable - net |  | 167 |  |  | 11,883 |  |  | 382 |  |  | — |  |  | 12,432 |
Due from affiliates |  | 42 |  |  | 16,606 |  |  | 3 |  |  | — |  |  | 16,651 |
Inventories |  | 180 |  |  | 146,689 |  |  | 86,694 |  |  | — |  |  | 233,563 |
Prepaid and other current assets |  | 6,838 |  |  | 5,699 |  |  | 9,673 |  |  | — |  |  | 22,210 |
Assets held for sale |  | — |  |  | — |  |  | 22,313 |  |  | — |  |  | 22,313 |
Total current assets |  | 43,897 |  |  | 181,416 |  |  | 215,309 |  |  | — |  |  | 440,622 |
Property, plant and equipment - net |  | 12,311 |  |  | 328,069 |  |  | 685,905 |  |  | — |  |  | 1,026,285 |
Investment in subsidiaries |  | 702,659 |  |  | 51,240 |  |  | — |  |  | (753,899 | ) |  | — |
Due from affiliates - long term |  | 529,873 |  |  | 346,893 |  |  | 1,792 |  |  | (878,558 | ) |  | — |
Other assets |  | 28,215 |  |  | 49,331 |  |  | 27,596 |  |  | (31,722 | ) |  | 73,420 |
TOTAL |  | $ | 1,316,955 |  |  | $ | 956,949 |  |  | $ | 930,602 |  |  | $ | (1,664,179 | ) |  | $ | 1,540,327 |
Accounts payable, trade |  | $ | 6,125 |  |  | $ | 52,921 |  |  | $ | 35,914 |  |  | $ | — |  |  | $ | 94,960 |
Due to affiliates |  | 417 |  |  | 9,641 |  |  | 5,310 |  |  | — |  |  | 15,368 |
Accrued and other current liabilities |  | 11,950 |  |  | 17,744 |  |  | 20,406 |  |  | — |  |  | 50,100 |
Accrued employee benefits costs |  | 1,932 |  |  | 8,317 |  |  | 668 |  |  | — |  |  | 10,917 |
Industrial revenue bonds |  | — |  |  | 7,815 |  |  | — |  |  | — |  |  | 7,815 |
Total current liabilities |  | 20,424 |  |  | 96,438 |  |  | 62,298 |  |  | — |  |  | 179,160 |
Senior notes payable |  | 247,699 |  |  | — |  |  | — |  |  | — |  |  | 247,699 |
Accrued pension benefits costs cost - less current portion |  | 46,390 |  |  | 20,167 |  |  | 14,658 |  |  | (31,722 | ) |  | 49,493 |
Accrued postretirement benefits costs - less current portion |  | 4,380 |  |  | 120,242 |  |  | 1,733 |  |  | — |  |  | 126,355 |
Other liabilities |  | 4,160 |  |  | 30,920 |  |  | 36,946 |  |  | — |  |  | 72,026 |
Due to affiliates - long term |  | 237,247 |  |  | 42,609 |  |  | 598,702 |  |  | (878,558 | ) |  | — |
Deferred taxes |  | — |  |  | 2,735 |  |  | 106,204 |  |  | — |  |  | 108,939 |
Total noncurrent liabilities |  | 539,876 |  |  | 216,673 |  |  | 758,243 |  |  | (910,280 | ) |  | 604,512 |
Preferred stock |  | 1 |  |  | — |  |  | — |  |  | — |  |  | 1 |
Common stock |  | 944 |  |  | 1 |  |  | 59 |  |  | (60 | ) |  | 944 |
Other shareholder's equity |  | 755,710 |  |  | 643,837 |  |  | 110,002 |  |  | (753,839 | ) |  | 755,710 |
Total shareholder's equity |  | 756,655 |  |  | 643,838 |  |  | 110,061 |  |  | (753,899 | ) |  | 756,655 |
TOTAL |  | $ | 1,316,955 |  |  | $ | 956,949 |  |  | $ | 930,602 |  |  | $ | (1,664,179 | ) |  | $ | 1,540,327 |
Condensed Consolidating Statement of Cash Flows
For the three months ended March 31, 2017
|  | The Company |  | Combined Guarantor Subsidiaries |  | Combined Non-Guarantor Subsidiaries |  | Consolidating Adjustments |  | Total Consolidated
Net cash provided by (used in) operating activities |  | $ | (1,142 | ) |  | $ | (21,757 | ) |  | $ | 11,555 |  |  | $ | — |  |  | $ | (11,344 | )
Purchase of property, plant and equipment |  | (4,395 | ) |  | (2,346 | ) |  | (2,304 | ) |  | — |  |  | (9,045 | )
Proceeds from sale of Ravenswood |  | — |  |  | — |  |  | 13,585 |  |  | — |  |  | 13,585 |
Restricted and other cash deposits |  | — |  |  | (3 | ) |  | 256 |  |  | — |  |  | 253 |
Intercompany transactions |  | 19,224 |  |  | 23,582 |  |  | (12,406 | ) |  | (30,400 | ) |  | — |
Net cash provided by (used in) investing activities |  | 14,829 |  |  | 21,233 |  |  | (869 | ) |  | (30,400 | ) |  | 4,793 |
Borrowings under revolving credit facilities |  | 233 |  |  | — |  |  | — |  |  | — |  |  | 233 |
Repayments under revolving credit facilities |  | (233 | ) |  | — |  |  | — |  |  | — |  |  | (233 | )
Issuance of common stock |  | 43 |  |  | — |  |  | — |  |  | — |  |  | 43 |
Intercompany transactions |  | (11,182 | ) |  | 755 |  |  | (19,973 | ) |  | 30,400 |  |  | — |
Net cash provided by financing activities |  | (11,139 | ) |  | 755 |  |  | (19,973 | ) |  | 30,400 |  |  | 43 |
CHANGE IN CASH AND CASH EQUIVALENTS |  | 2,548 |  |  | 231 |  |  | (9,287 | ) |  | — |  |  | (6,508 | )
Cash and cash equivalents, beginning of period |  | 36,670 |  |  | (255 | ) |  | 95,988 |  |  | — |  |  | 132,403 |
Cash and cash equivalents, end of period |  | $ | 39,218 |  |  | $ | (24 | ) |  | $ | 86,701 |  |  | $ | — |  |  | $ | 125,895 |
Condensed Consolidating Statement of Cash Flows
For the three months ended March 31, 2016
|  | The Company |  | Combined Guarantor Subsidiaries |  | Combined Non-Guarantor Subsidiaries |  | Consolidating Adjustments |  | Total Consolidated
Net cash provided by (used in) operating activities |  | $ | (8,754 | ) |  | $ | 5,435 |  |  | $ | 9,956 |  |  | $ | 8,266 |  |  | $ | 14,903 |
Purchase of property, plant and equipment |  | — |  |  | (1,426 | ) |  | (2,409 | ) |  | — |  |  | (3,835 | )
Net cash used in investing activities |  | — |  |  | (1,426 | ) |  | (2,409 | ) |  | — |  |  | (3,835 | )
Borrowings under revolving credit facilities |  | 371 |  |  | — |  |  | — |  |  | — |  |  | 371 |
Repayments under revolving credit facilities |  | (371 | ) |  | — |  |  | — |  |  | — |  |  | (371 | )
Intercompany transactions |  | — |  |  | (436 | ) |  | 8,702 |  |  | (8,266 | ) |  | — |
Net cash provided by (used in) financing activities |  | — |  |  | (436 | ) |  | 8,702 |  |  | (8,266 | ) |  | — |
CHANGE IN CASH AND CASH EQUIVALENTS |  | (8,754 | ) |  | 3,573 |  |  | 16,249 |  |  | — |  |  | 11,068 |
Cash and cash equivalents, beginning of period |  | 58,421 |  |  | (3,647 | ) |  | 60,619 |  |  | — |  |  | 115,393 |
Cash and cash equivalents, end of period |  | $ | 49,667 |  |  | $ | (74 | ) |  | $ | 76,868 |  |  | $ | — |  |  | $ | 126,461 |
| Condensed consolidating financial information Our 2021 Notes are guaranteed by each of our material existing and future domestic subsidiaries (the "Guarantor Subsidiaries"), except for Nordural US LLC, Century Aluminum Development LLC and Century Aluminum of West Virginia, Inc. The Guarantor Subsidiaries are 100% owned by Century. All guarantees are full and unconditional; all guarantees are joint and several. These notes are not guaranteed by our foreign subsidiaries (such foreign subsidiaries along with Nordural US LLC, Century Aluminum Development LLC and Century Aluminum of West Virginia, collectively the “Non-Guarantor Subsidiaries”). We allocate corporate expenses or income to our subsidiaries and charge interest on certain intercompany balances. The following summarized condensed consolidating statements of comprehensive income (loss) for the years ended December 31, 2016, 2015 and 2014, condensed consolidating balance sheets as of December 31, 2016 and 2015, and the condensed consolidating statements of cash flows for the years ended December 31, 2016, 2015 and 2014 present separate results for Century, the Guarantor Subsidiaries, the Non-Guarantor Subsidiaries, consolidating adjustments and total consolidated amounts.
|  | Condensed Consolidating Statements of Comprehensive Income (Loss)
|  | For the year ended December 31, 2016
|  | The Company |  | Combined Guarantor Subsidiaries |  | Combined Non-Guarantor Subsidiaries |  | Consolidating Adjustments |  | Total Consolidated
NET SALES: |  |  |  |  |  |  |  |  |  |
Related parties |  | $ | — |  |  | $ | 668,486 |  |  | $ | 510,145 |  |  | $ | — |  |  | $ | 1,178,631 |
Third-party customers |  | — |  |  | 140,426 |  |  | 37 |  |  | — |  |  | 140,463 |
Total net sales |  | — |  |  | 808,912 |  |  | 510,182 |  |  | — |  |  | 1,319,094 |
Cost of goods sold |  | — |  |  | 862,632 |  |  | 467,504 |  |  | — |  |  | 1,330,136 |
Gross profit (loss) |  | — |  |  | (53,720 | ) |  | 42,678 |  |  | — |  |  | (11,042 | )
Selling, general and administrative expenses |  | 20,704 |  |  | 9,853 |  |  | 9,707 |  |  | — |  |  | 40,264 |
Helguvik impairment |  | — |  |  | — |  |  | 152,220 |  |  | — |  |  | 152,220 |
Ravenswood charges |  | — |  |  | — |  |  | 26,830 |  |  | — |  |  | 26,830 |
Other operating expense - net |  | — |  |  | — |  |  | 3,857 |  |  | — |  |  | 3,857 |
Operating loss |  | (20,704 | ) |  | (63,573 | ) |  | (149,936 | ) |  | — |  |  | (234,213 | )
Interest expense - third parties |  | (20,378 | ) |  | (1,659 | ) |  | (179 | ) |  | — |  |  | (22,216 | )
Interest income (expense) - affiliates |  | 39,211 |  |  | 8,107 |  |  | (47,318 | ) |  | — |  |  | — |
Interest income - third parties |  | 182 |  |  | 10 |  |  | 566 |  |  | — |  |  | 758 |
Net gain on forward and derivative contracts |  | — |  |  | 3,487 |  |  | — |  |  | — |  |  | 3,487 |
Other income (expense) - net |  | 1,239 |  |  | 218 |  |  | (138 | ) |  | — |  |  | 1,319 |
Loss before income taxes and equity in earnings (loss) of subsidiaries and joint ventures |  | (450 | ) |  | (53,410 | ) |  | (197,005 | ) |  | — |  |  | (250,865 | )
Income tax (expense) benefit |  | 1,925 |  |  | — |  |  | (4,749 | ) |  | — |  |  | (2,824 | )
Income (loss) before equity in earnings (loss) of subsidiaries and joint ventures |  | 1,475 |  |  | (53,410 | ) |  | (201,754 | ) |  | — |  |  | (253,689 | )
Equity in earnings (loss) of subsidiaries and joint ventures |  | (253,890 | ) |  | 12,463 |  |  | 1,274 |  |  | 241,427 |  |  | 1,274 |
Net loss |  | $ | (252,415 | ) |  | $ | (40,947 | ) |  | $ | (200,480 | ) |  | $ | 241,427 |  |  | $ | (252,415 | )
Other comprehensive income before income tax effect |  | 288 |  |  | 1,868 |  |  | 5,134 |  |  | (7,002 | ) |  | 288 |
Income tax effect |  | (1,531 | ) |  | — |  |  | (24 | ) |  | 24 |  |  | (1,531 | )
Other comprehensive income (loss) |  | (1,243 | ) |  | 1,868 |  |  | 5,110 |  |  | (6,978 | ) |  | (1,243 | )
Total comprehensive loss |  | $ | (253,658 | ) |  | $ | (39,079 | ) |  | $ | (195,370 | ) |  | $ | 234,449 |  |  | $ | (253,658 | )
|  | Condensed Consolidating Statements of Comprehensive Income (Loss)
|  | For the year ended December 31, 2015
|  | The Company |  | Combined Guarantor Subsidiaries |  | Combined Non-Guarantor Subsidiaries |  | Consolidating Adjustments |  | Total Consolidated
NET SALES: |  |  |  |  |  |  |  |  |  |
Related parties |  | $ | — |  |  | $ | 1,277,474 |  |  | $ | 632,597 |  |  | $ | (42,360 | ) |  | $ | 1,867,711 |
Third-party customers |  | — |  |  | 82,327 |  |  | 43 |  |  | (224 | ) |  | 82,146 |
Total net sales |  | — |  |  | 1,359,801 |  |  | 632,640 |  |  | (42,584 | ) |  | 1,949,857 |
Cost of goods sold |  | — |  |  | 1,388,400 |  |  | 564,380 |  |  | (44,236 | ) |  | 1,908,544 |
Gross profit (loss) |  | — |  |  | (28,599 | ) |  | 68,260 |  |  | 1,652 |  |  | 41,313 |
Selling, general and administrative expenses |  | 28,000 |  |  | 8,798 |  |  | 5,317 |  |  | — |  |  | 42,115 |
Ravenswood charges |  | — |  |  | — |  |  | 30,850 |  |  | — |  |  | 30,850 |
Other operating expense - net |  | — |  |  | — |  |  | 7,436 |  |  | — |  |  | 7,436 |
Operating income (loss) |  | (28,000 | ) |  | (37,397 | ) |  | 24,657 |  |  | 1,652 |  |  | (39,088 | )
Interest expense - third parties |  | (20,201 | ) |  | (1,567 | ) |  | (186 | ) |  | — |  |  | (21,954 | )
Interest income (expense) - affiliates |  | 37,626 |  |  | — |  |  | (37,626 | ) |  | — |  |  | — |
Interest income - third parties |  | 65 |  |  | 4 |  |  | 270 |  |  | — |  |  | 339 |
Net gain on forward and derivative contracts |  | — |  |  | 1,411 |  |  | 189 |  |  | — |  |  | 1,600 |
Unrealized gain on fair value of contingent consideration |  | — |  |  | 18,337 |  |  | — |  |  | — |  |  | 18,337 |
Other income (expense) - net |  | 1,356 |  |  | (658 | ) |  | 2,356 |  |  | (3,410 | ) |  | (356 | )
Loss before income taxes and equity in earnings (loss) of subsidiaries and joint ventures |  | (9,154 | ) |  | (19,870 | ) |  | (10,340 | ) |  | (1,758 | ) |  | (41,122 | )
Income tax benefit (expense) |  | 2,140 |  |  | — |  |  | (11,416 | ) |  | — |  |  | (9,276 | )
Income (loss) before equity in earnings (loss) of subsidiaries and joint ventures |  | (7,014 | ) |  | (19,870 | ) |  | (21,756 | ) |  | (1,758 | ) |  | (50,398 | )
BHH impairment |  | — |  |  | — |  |  | (11,584 | ) |  | — |  |  | (11,584 | )
Equity in earnings (loss) of subsidiaries and joint ventures |  | (52,296 | ) |  | — |  |  | 2,672 |  |  | 52,296 |  |  | 2,672 |
Net loss |  | $ | (59,310 | ) |  | $ | (19,870 | ) |  | $ | (30,668 | ) |  | $ | 50,538 |  |  | $ | (59,310 | )
Other comprehensive income (loss) before income tax effect |  | 6,568 |  |  | 14,754 |  |  | (1,114 | ) |  | (13,640 | ) |  | 6,568 |
Income tax effect |  | (1,536 | ) |  | — |  |  | 33 |  |  | (33 | ) |  | (1,536 | )
Other comprehensive income (loss) |  | 5,032 |  |  | 14,754 |  |  | (1,081 | ) |  | (13,673 | ) |  | 5,032 |
Total comprehensive loss |  | $ | (54,278 | ) |  | $ | (5,116 | ) |  | $ | (31,749 | ) |  | $ | 36,865 |  |  | $ | (54,278 | )
|  | Condensed Consolidating Statements of Comprehensive Income (Loss)
|  | For the year ended December 31, 2014
|  | The Company |  | Combined Guarantor Subsidiaries |  | Combined Non-Guarantor Subsidiaries |  | Consolidating Adjustments |  | Total Consolidated
NET SALES: |  |  |  |  |  |  |  |  |  |
Related parties |  | $ | — |  |  | $ | 715,796 |  |  | $ | 625,076 |  |  | $ | (78,771 | ) |  | $ | 1,262,101 |
Third-party customers |  | — |  |  | 669,466 |  |  | 31 |  |  | (556 | ) |  | 668,941 |
Total net sales |  | — |  |  | 1,385,262 |  |  | 625,107 |  |  | (79,327 | ) |  | 1,931,042 |
Cost of goods sold |  | — |  |  | 1,282,194 |  |  | 522,543 |  |  | (75,494 | ) |  | 1,729,243 |
Gross profit |  | — |  |  | 103,068 |  |  | 102,564 |  |  | (3,833 | ) |  | 201,799 |
Selling, general and administrative expenses |  | 32,840 |  |  | 11,353 |  |  | 5,002 |  |  | — |  |  | 49,195 |
Other operating expense - net |  | — |  |  | — |  |  | 12,481 |  |  | — |  |  | 12,481 |
Operating income (loss) |  | (32,840 | ) |  | 91,715 |  |  | 85,081 |  |  | (3,833 | ) |  | 140,123 |
Interest expense - third parties |  | (20,228 | ) |  | (1,555 | ) |  | (232 | ) |  | — |  |  | (22,015 | )
Interest income (expense) - affiliates |  | 43,688 |  |  | — |  |  | (43,688 | ) |  | — |  |  | — |
Interest income - third parties |  | 15 |  |  | — |  |  | 286 |  |  | — |  |  | 301 |
Net gain (loss) on forward and derivative contracts |  | (1,080 | ) |  | 1,259 |  |  | — |  |  | — |  |  | 179 |
Unrealized gain on fair value of contingent consideration |  | — |  |  | 7,943 |  |  | — |  |  | — |  |  | 7,943 |
Gain on remeasurement of equity investment |  | — |  |  | 15,955 |  |  | — |  |  | — |  |  | 15,955 |
Other income (expense) - net |  | 518 |  |  | (459 | ) |  | 4,564 |  |  | (3,632 | ) |  | 991 |
Income (loss) before income taxes and equity in earnings of subsidiaries and joint ventures |  | (9,927 | ) |  | 114,858 |  |  | 46,011 |  |  | (7,465 | ) |  | 143,477 |
Income tax expense |  | (4,777 | ) |  | (493 | ) |  | (13,211 | ) |  | 173 |  |  | (18,308 | )
Income (loss) before equity in earnings of subsidiaries and joint ventures |  | (14,704 | ) |  | 114,365 |  |  | 32,800 |  |  | (7,292 | ) |  | 125,169 |
Equity in earnings of subsidiaries and joint ventures |  | 141,178 |  |  | — |  |  | 1,305 |  |  | (141,178 | ) |  | 1,305 |
Net income |  | $ | 126,474 |  |  | $ | 114,365 |  |  | $ | 34,105 |  |  | $ | (148,470 | ) |  | $ | 126,474 |
Other comprehensive loss before income tax effect |  | (24,022 | ) |  | (28,955 | ) |  | (2,662 | ) |  | 18,967 |  |  | (36,672 | )
Income tax effect |  | (1,829 | ) |  | — |  |  | 33 |  |  | (33 | ) |  | (1,829 | )
Other comprehensive loss |  | (25,851 | ) |  | (28,955 | ) |  | (2,629 | ) |  | 18,934 |  |  | (38,501 | )
Total comprehensive income |  | $ | 100,623 |  |  | $ | 85,410 |  |  | $ | 31,476 |  |  | $ | (129,536 | ) |  | $ | 87,973 |
|  | Condensed Consolidating Balance Sheet
|  | As of December 31, 2016
|  | The Company |  | Combined Guarantor Subsidiaries |  | Combined Non-Guarantor Subsidiaries |  | Consolidating Adjustments |  | Total Consolidated
Cash & cash equivalents |  | $ | 36,670 |  |  | $ | (255 | ) |  | $ | 95,988 |  |  | $ | — |  |  | $ | 132,403 |
Restricted cash |  | — |  |  | 794 |  |  | 256 |  |  | — |  |  | 1,050 |
Accounts receivable - net |  | 167 |  |  | 11,883 |  |  | 382 |  |  | — |  |  | 12,432 |
Due from affiliates |  | 42 |  |  | 16,606 |  |  | 3 |  |  | — |  |  | 16,651 |
Inventories |  | 180 |  |  | 146,689 |  |  | 86,694 |  |  | — |  |  | 233,563 |
Prepaid and other current assets |  | 6,838 |  |  | 5,699 |  |  | 9,673 |  |  | — |  |  | 22,210 |
Assets held for sale |  | — |  |  | — |  |  | 22,313 |  |  | — |  |  | 22,313 |
Total current assets |  | 43,897 |  |  | 181,416 |  |  | 215,309 |  |  | — |  |  | 440,622 |
Property, plant and equipment - net |  | 12,311 |  |  | 328,069 |  |  | 685,905 |  |  | — |  |  | 1,026,285 |
Investment in subsidiaries |  | 702,659 |  |  | 51,240 |  |  | — |  |  | (753,899 | ) |  | — |
Due from affiliates - long term |  | 529,873 |  |  | 346,893 |  |  | 1,792 |  |  | (878,558 | ) |  | — |
Other assets |  | 28,215 |  |  | 49,331 |  |  | 27,596 |  |  | (31,722 | ) |  | 73,420 |
TOTAL |  | $ | 1,316,955 |  |  | $ | 956,949 |  |  | $ | 930,602 |  |  | $ | (1,664,179 | ) |  | $ | 1,540,327 |
Accounts payable, trade |  | $ | 6,125 |  |  | $ | 52,921 |  |  | $ | 35,914 |  |  | $ | — |  |  | $ | 94,960 |
Due to affiliates |  | 417 |  |  | 9,641 |  |  | 5,310 |  |  | — |  |  | 15,368 |
Accrued and other current liabilities |  | 11,950 |  |  | 17,744 |  |  | 20,406 |  |  | — |  |  | 50,100 |
Accrued employee benefits costs |  | 1,932 |  |  | 8,317 |  |  | 668 |  |  | — |  |  | 10,917 |
Industrial revenue bonds |  | — |  |  | 7,815 |  |  | — |  |  | — |  |  | 7,815 |
Total current liabilities |  | 20,424 |  |  | 96,438 |  |  | 62,298 |  |  | — |  |  | 179,160 |
Senior notes payable |  | 247,699 |  |  | — |  |  | — |  |  | — |  |  | 247,699 |
Accrued pension benefits costs cost - less current portion |  | 46,390 |  |  | 20,167 |  |  | 14,658 |  |  | (31,722 | ) |  | 49,493 |
Accrued postretirement benefits costs - less current portion |  | 4,380 |  |  | 120,242 |  |  | 1,733 |  |  | — |  |  | 126,355 |
Other liabilities |  | 4,160 |  |  | 30,920 |  |  | 36,946 |  |  | — |  |  | 72,026 |
Due to affiliates - long term |  | 237,247 |  |  | 42,609 |  |  | 598,702 |  |  | (878,558 | ) |  | — |
Deferred taxes |  | — |  |  | 2,735 |  |  | 106,204 |  |  | — |  |  | 108,939 |
Total noncurrent liabilities |  | 539,876 |  |  | 216,673 |  |  | 758,243 |  |  | (910,280 | ) |  | 604,512 |
Preferred stock |  | 1 |  |  | — |  |  | — |  |  | — |  |  | 1 |
Common stock |  | 944 |  |  | 1 |  |  | 59 |  |  | (60 | ) |  | 944 |
Other shareholder's equity |  | 755,710 |  |  | 643,837 |  |  | 110,002 |  |  | (753,839 | ) |  | 755,710 |
Total shareholder's equity |  | 756,655 |  |  | 643,838 |  |  | 110,061 |  |  | (753,899 | ) |  | 756,655 |
TOTAL |  | $ | 1,316,955 |  |  | $ | 956,949 |  |  | $ | 930,602 |  |  | $ | (1,664,179 | ) |  | $ | 1,540,327 |
|  | Condensed Consolidating Balance Sheet
|  | As of December 31, 2015
|  | The Company |  | Combined Guarantor Subsidiaries |  | Combined Non-Guarantor Subsidiaries |  | Consolidating Adjustments |  | Total Consolidated
Cash & cash equivalents |  | $ | 58,421 |  |  | $ | (3,647 | ) |  | $ | 60,619 |  |  | $ | — |  |  | $ | 115,393 |
Restricted cash |  | — |  |  | 791 |  |  | — |  |  | — |  |  | 791 |
Accounts receivable - net |  | 104 |  |  | 8,891 |  |  | 480 |  |  | — |  |  | 9,475 |
Due from affiliates |  | 13 |  |  | 14,493 |  |  | 2,911 |  |  | — |  |  | 17,417 |
Inventories |  | 180 |  |  | 148,280 |  |  | 85,937 |  |  | (2,525 | ) |  | 231,872 |
Prepaid and other current assets |  | 7,713 |  |  | 16,242 |  |  | 18,457 |  |  | — |  |  | 42,412 |
Assets held for sale |  | — |  |  | — |  |  | 30,697 |  |  | — |  |  | 30,697 |
Total current assets |  | 66,431 |  |  | 185,050 |  |  | 199,101 |  |  | (2,525 | ) |  | 448,057 |
Property, plant and equipment - net |  | 9,188 |  |  | 361,626 |  |  | 861,442 |  |  | — |  |  | 1,232,256 |
Investment in subsidiaries |  | 593,604 |  |  | — |  |  | — |  |  | (593,604 | ) |  | — |
Due from affiliates - long term |  | 632,170 |  |  | — |  |  | — |  |  | (632,170 | ) |  | — |
Other assets |  | 29,536 |  |  | 19,153 |  |  | 16,047 |  |  | 7,419 |  |  | 72,155 |
TOTAL |  | $ | 1,330,929 |  |  | $ | 565,829 |  |  | $ | 1,076,590 |  |  | $ | (1,220,880 | ) |  | $ | 1,752,468 |
Accounts payable, trade |  | $ | 2,380 |  |  | $ | 53,145 |  |  | $ | 34,964 |  |  | $ | — |  |  | $ | 90,489 |
Due to affiliates |  | 2,143 |  |  | 7,167 |  |  | 735 |  |  | — |  |  | 10,045 |
Accrued and other current liabilities |  | 11,247 |  |  | 14,759 |  |  | 22,816 |  |  | — |  |  | 48,822 |
Accrued employee benefits costs |  | 1,824 |  |  | 7,644 |  |  | 680 |  |  | — |  |  | 10,148 |
Industrial revenue bonds |  | — |  |  | 7,815 |  |  | — |  |  | — |  |  | 7,815 |
Total current liabilities |  | 17,594 |  |  | 90,530 |  |  | 59,195 |  |  | — |  |  | 167,319 |
Senior notes payable |  | 247,278 |  |  | — |  |  | — |  |  | — |  |  | 247,278 |
Accrued pension benefits costs cost - less current portion |  | 39,831 |  |  | (11,021 | ) |  | 15,189 |  |  | — |  |  | 43,999 |
Accrued postretirement benefits costs - less current portion |  | 4,524 |  |  | 119,911 |  |  | 1,564 |  |  | — |  |  | 125,999 |
Other liabilities |  | 3,307 |  |  | 30,505 |  |  | 11,779 |  |  | 7,418 |  |  | 53,009 |
Intercompany loan |  | — |  |  | 124,518 |  |  | 509,652 |  |  | (634,170 | ) |  | — |
Deferred taxes |  | — |  |  | — |  |  | 106,053 |  |  | — |  |  | 106,053 |
Total noncurrent liabilities |  | 294,940 |  |  | 263,913 |  |  | 644,237 |  |  | (626,752 | ) |  | 576,338 |
Preferred stock |  | 1 |  |  | — |  |  | — |  |  | — |  |  | 1 |
Common stock |  | 942 |  |  | — |  |  | 224,424 |  |  | (224,424 | ) |  | 942 |
Other shareholder's equity |  | 1,017,452 |  |  | 211,386 |  |  | 148,734 |  |  | (369,704 | ) |  | 1,007,868 |
Total shareholder's equity |  | 1,018,395 |  |  | 211,386 |  |  | 373,158 |  |  | (594,128 | ) |  | 1,008,811 |
TOTAL |  | $ | 1,330,929 |  |  | $ | 565,829 |  |  | $ | 1,076,590 |  |  | $ | (1,220,880 | ) |  | $ | 1,752,468 |
|  | Condensed Consolidating Statement of Cash Flows
|  | For the year ended December 31, 2016
|  | The Company |  | Combined Guarantor Subsidiaries |  | Combined Non-Guarantor Subsidiaries |  | Consolidating Adjustments |  | Total Consolidated
Net cash provided by (used in) operating activities |  | $ | (63,446 | ) |  | $ | 19,019 |  |  | $ | 82,600 |  |  | $ | — |  |  | $ | 38,173 |
Purchase of property, plant and equipment |  | (1,425 | ) |  | (7,807 | ) |  | (12,712 | ) |  | — |  |  | (21,944 | )
Proceeds from sale of property, plant and equipment |  | — |  |  | — |  |  | 1,040 |  |  | — |  |  | 1,040 |
Restricted and other cash deposits |  | — |  |  | (3 | ) |  | (256 | ) |  | — |  |  | (259 | )
Intercompany transactions |  | 27,761 |  |  | (15,305 | ) |  | (937 | ) |  | (11,519 | ) |  | — |
Net cash provided by (used in) investing activities |  | 26,336 |  |  | (23,115 | ) |  | (12,865 | ) |  | (11,519 | ) |  | (21,163 | )
Borrowings under revolving credit facilities |  | 1,179 |  |  | — |  |  | — |  |  | — |  |  | 1,179 |
Repayments under revolving credit facilities |  | (1,179 | ) |  | — |  |  | — |  |  | — |  |  | (1,179 | )
Intercompany transactions |  | 15,359 |  |  | 7,488 |  |  | (34,366 | ) |  | 11,519 |  |  | — |
Net cash provided by (used in) financing activities |  | 15,359 |  |  | 7,488 |  |  | (34,366 | ) |  | 11,519 |  |  | — |
CHANGE IN CASH AND CASH EQUIVALENTS |  | (21,751 | ) |  | 3,392 |  |  | 35,369 |  |  | — |  |  | 17,010 |
Cash and cash equivalents, beginning of period |  | 58,421 |  |  | (3,647 | ) |  | 60,619 |  |  | — |  |  | 115,393 |
Cash and cash equivalents, end of period |  | $ | 36,670 |  |  | $ | (255 | ) |  | $ | 95,988 |  |  | $ | — |  |  | $ | 132,403 |
|  | Condensed Consolidating Statement of Cash Flows
|  | For the year ended December 31, 2015
|  | The Company |  | Combined Guarantor Subsidiaries |  | Combined Non-Guarantor Subsidiaries |  | Consolidating Adjustments |  | Total Consolidated
Net cash provided by operating activities |  | $ | 25,423 |  |  | $ | 30,890 |  |  | $ | 65,085 |  |  | $ | (89,532 | ) |  | $ | 31,866 |
Purchase of property, plant and equipment |  | (8,574 | ) |  | (21,477 | ) |  | (24,209 | ) |  | (440 | ) |  | (54,700 | )
Purchase of remaining interest in Mt. Holly smelter |  | 11,313 |  |  | — |  |  | — |  |  | — |  |  | 11,313 |
Proceeds from sale of property, plant and equipment |  | — |  |  | 14 |  |  | — |  |  | — |  |  | 14 |
Restricted and other cash deposits |  | — |  |  | (4 | ) |  | 14 |  |  | — |  |  | 10 |
Intercompany transactions |  | (4,072 | ) |  | — |  |  | — |  |  | 4,072 |  |  | — |
Net cash used in investing activities |  | (1,333 | ) |  | (21,467 | ) |  | (24,195 | ) |  | 3,632 |  |  | (43,363 | )
Borrowings under revolving credit facilities |  | 1,737 |  |  | — |  |  | — |  |  | — |  |  | 1,737 |
Repayments under revolving credit facilities |  | (1,737 | ) |  | — |  |  | — |  |  | — |  |  | (1,737 | )
Repurchase of common stock |  | (36,352 | ) |  | — |  |  | — |  |  | — |  |  | (36,352 | )
Intercompany transactions |  | — |  |  | (11,883 | ) |  | (74,017 | ) |  | 85,900 |  |  | — |
Net cash used in financing activities |  | (36,352 | ) |  | (11,883 | ) |  | (74,017 | ) |  | 85,900 |  |  | (36,352 | )
CHANGE IN CASH AND CASH EQUIVALENTS |  | (12,262 | ) |  | (2,460 | ) |  | (33,127 | ) |  | — |  |  | (47,849 | )
Cash and cash equivalents, beginning of year |  | 70,683 |  |  | (1,187 | ) |  | 93,746 |  |  | — |  |  | 163,242 |
Cash and cash equivalents, end of year |  | $ | 58,421 |  |  | $ | (3,647 | ) |  | $ | 60,619 |  |  | $ | — |  |  | $ | 115,393 |
|  | Condensed Consolidating Statement of Cash Flows
|  | For the year ended December 31, 2014
|  | The Company |  | Combined Guarantor Subsidiaries |  | Combined Non-Guarantor Subsidiaries |  | Consolidating Adjustments |  | Total Consolidated
Net cash provided by operating activities |  | $ | 92,338 |  |  | $ | 40,711 |  |  | $ | 139,896 |  |  | $ | (65,265 | ) |  | $ | 207,680 |
Purchase of property, plant and equipment |  | (587 | ) |  | (22,939 | ) |  | (31,603 | ) |  | 3 |  |  | (55,126 | )
Purchase of Sebree smelter |  | (1,042 | ) |  | — |  |  | — |  |  | — |  |  | (1,042 | )
Purchase of remaining interest in Mt. Holly smelter |  | (65,100 | ) |  | — |  |  | — |  |  | — |  |  | (65,100 | )
Proceeds from sale of property, plant and equipment |  | — |  |  | — |  |  | 46 |  |  | — |  |  | 46 |
Restricted and other cash deposits |  | — |  |  | — |  |  | 896 |  |  | — |  |  | 896 |
Net cash used in investing activities |  | (66,729 | ) |  | (22,939 | ) |  | (30,661 | ) |  | 3 |  |  | (120,326 | )
Repayment of debt |  | (2,603 | ) |  | — |  |  | — |  |  | — |  |  | (2,603 | )
Borrowings under revolving credit facilities |  | 92,423 |  |  | — |  |  | — |  |  | — |  |  | 92,423 |
Repayments under revolving credit facilities |  | (92,423 | ) |  | — |  |  | (6,000 | ) |  | — |  |  | (98,423 | )
Issuance of common stock |  | 403 |  |  | — |  |  | — |  |  | — |  |  | 403 |
Intercompany transactions |  | — |  |  | (17,801 | ) |  | (47,461 | ) |  | 65,262 |  |  | — |
Net cash used in financing activities |  | (2,200 | ) |  | (17,801 | ) |  | (53,461 | ) |  | 65,262 |  |  | (8,200 | )
CHANGE IN CASH AND CASH EQUIVALENTS |  | 23,409 |  |  | (29 | ) |  | 55,774 |  |  | — |  |  | 79,154 |
Cash and cash equivalents, beginning of year |  | 47,274 |  |  | (1,158 | ) |  | 37,972 |  |  | — |  |  | 84,088 |
Cash and cash equivalents, end of year |  | $ | 70,683 |  |  | $ | (1,187 | ) |  | $ | 93,746 |  |  | $ | — |  |  | $ | 163,242 |

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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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