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Supplemental Financial Information (Consolidating Statements of Operations) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Condensed Income Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 282,093 | $ 304,994 | $ 253,171 | $ 200,615 | $ 201,994 | $ 234,101 | $ 234,960 | $ 191,032 | $ 1,040,873 | $ 862,087 | $ 827,567
Cost of sales |  |  |  |  |  |  |  |  | 853,897 | 722,042 | 669,470
Gross profit | 51,546 | 61,396 | 44,119 | 29,915 | 28,480 | 41,578 | 40,123 | 29,864 | 186,976 | 140,045 | 158,097
Selling, general, and administrative expense |  |  |  |  |  |  |  |  | 134,028 | 102,492 | 113,457
Intangible asset impairment |  |  |  |  |  |  |  |  | 4,863 | 107,970 | 23,160
Income (loss) from operations | 4,520 | 23,394 | 11,201 | 8,970 | (103,872) | 18,392 | 14,730 | 333 | 48,085 | (70,417) | 21,480
Interest expense | 3,614 | 3,878 | 3,811 | 3,700 | 3,433 | 3,657 | 3,691 | 3,640 | 15,003 | 14,421 | 22,489
Other income |  |  |  |  |  |  |  |  | (4,018) | (88) | (177)
Income (loss) before taxes |  |  |  |  |  |  |  |  | 37,100 | (84,750) | (832)
Provision for (benefit of) income taxes |  |  |  |  |  |  |  |  | 13,624 | (2,958) | 4,797
Income (loss) from continuing operations | 220 | 13,632 | 4,087 | 5,537 | (95,708) | 9,571 | 6,431 | (2,086) | 23,476 | (81,792) | (5,629)
Loss before taxes |  |  |  |  |  |  |  |  | (44) | (51) | (7)
Benefit of income taxes |  |  |  |  |  |  |  |  | (16) | (19) | (3)
Loss from discontinued operations | 0 | 0 | 0 | (28) | (1) | (31) | 0 | 0 | (28) | (32) | (4)
Equity in earnings from subsidiaries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net income (loss) | $ 220 | $ 13,632 | $ 4,087 | $ 5,509 | $ (95,709) | $ 9,540 | $ 6,431 | $ (2,086) | 23,448 | (81,824) | (5,633)
Gibraltar Industries, Inc. |  |  |  |  |  |  |  |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 0 | 0 | 0
Cost of sales |  |  |  |  |  |  |  |  | 0 | 0 | 0
Gross profit |  |  |  |  |  |  |  |  | 0 | 0 | 0
Selling, general, and administrative expense |  |  |  |  |  |  |  |  | 133 | 128 | 171
Intangible asset impairment |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income (loss) from operations |  |  |  |  |  |  |  |  | (133) | (128) | (171)
Interest expense |  |  |  |  |  |  |  |  | 13,609 | 13,568 | 21,214
Other income |  |  |  |  |  |  |  |  | 50 | 144 | 0
Income (loss) before taxes |  |  |  |  |  |  |  |  | (13,792) | (13,840) | (21,385)
Provision for (benefit of) income taxes |  |  |  |  |  |  |  |  | (4,427) | (4,381) | (7,480)
Income (loss) from continuing operations |  |  |  |  |  |  |  |  | (9,365) | (9,459) | (13,905)
Loss before taxes |  |  |  |  |  |  |  |  | 0 | 0 | 0
Benefit of income taxes |  |  |  |  |  |  |  |  | 0 | 0 | 0
Loss from discontinued operations |  |  |  |  |  |  |  |  | 0 | 0 | 0
Equity in earnings from subsidiaries |  |  |  |  |  |  |  |  | 36,401 | (71,191) | 9,041
Net income (loss) |  |  |  |  |  |  |  |  | 27,036 | (80,650) | (4,864)
Guarantor Subsidiaries |  |  |  |  |  |  |  |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 960,614 | 792,078 | 758,790
Cost of sales |  |  |  |  |  |  |  |  | 785,085 | 661,041 | 610,049
Gross profit |  |  |  |  |  |  |  |  | 175,529 | 131,037 | 148,741
Selling, general, and administrative expense |  |  |  |  |  |  |  |  | 116,529 | 95,735 | 105,693
Intangible asset impairment |  |  |  |  |  |  |  |  | 4,863 | 107,970 | 1,000
Income (loss) from operations |  |  |  |  |  |  |  |  | 54,137 | (72,668) | 42,048
Interest expense |  |  |  |  |  |  |  |  | 1,469 | 995 | 1,399
Other income |  |  |  |  |  |  |  |  | (3,801) | (328) | (177)
Income (loss) before taxes |  |  |  |  |  |  |  |  | 56,469 | (73,335) | 40,826
Provision for (benefit of) income taxes |  |  |  |  |  |  |  |  | 18,827 | 753 | 12,430
Income (loss) from continuing operations |  |  |  |  |  |  |  |  | 37,642 | (74,088) | 28,396
Loss before taxes |  |  |  |  |  |  |  |  | (44) | (51) | (7)
Benefit of income taxes |  |  |  |  |  |  |  |  | (16) | (19) | (3)
Loss from discontinued operations |  |  |  |  |  |  |  |  | (28) | (32) | (4)
Equity in earnings from subsidiaries |  |  |  |  |  |  |  |  | (1,213) | 2,929 | (19,351)
Net income (loss) |  |  |  |  |  |  |  |  | 36,401 | (71,191) | 9,041
Non-Guarantor Subsidiaries |  |  |  |  |  |  |  |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 109,984 | 88,096 | 91,198
Cost of sales |  |  |  |  |  |  |  |  | 94,949 | 77,914 | 81,073
Gross profit |  |  |  |  |  |  |  |  | 15,035 | 10,182 | 10,125
Selling, general, and administrative expense |  |  |  |  |  |  |  |  | 17,366 | 6,629 | 7,593
Intangible asset impairment |  |  |  |  |  |  |  |  | 0 | 0 | 22,160
Income (loss) from operations |  |  |  |  |  |  |  |  | (2,331) | 3,553 | (19,628)
Interest expense |  |  |  |  |  |  |  |  | (75) | (142) | (124)
Other income |  |  |  |  |  |  |  |  | (267) | 96 | 0
Income (loss) before taxes |  |  |  |  |  |  |  |  | (1,989) | 3,599 | (19,504)
Provision for (benefit of) income taxes |  |  |  |  |  |  |  |  | (776) | 670 | (153)
Income (loss) from continuing operations |  |  |  |  |  |  |  |  | (1,213) | 2,929 | (19,351)
Loss before taxes |  |  |  |  |  |  |  |  | 0 | 0 | 0
Benefit of income taxes |  |  |  |  |  |  |  |  | 0 | 0 | 0
Loss from discontinued operations |  |  |  |  |  |  |  |  | 0 | 0 | 0
Equity in earnings from subsidiaries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net income (loss) |  |  |  |  |  |  |  |  | (1,213) | 2,929 | (19,351)
Eliminations |  |  |  |  |  |  |  |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | (29,725) | (18,087) | (22,421)
Cost of sales |  |  |  |  |  |  |  |  | (26,137) | (16,913) | (21,652)
Gross profit |  |  |  |  |  |  |  |  | (3,588) | (1,174) | (769)
Selling, general, and administrative expense |  |  |  |  |  |  |  |  | 0 | 0 | 0
Intangible asset impairment |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income (loss) from operations |  |  |  |  |  |  |  |  | (3,588) | (1,174) | (769)
Interest expense |  |  |  |  |  |  |  |  | 0 | 0 | 0
Other income |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income (loss) before taxes |  |  |  |  |  |  |  |  | (3,588) | (1,174) | (769)
Provision for (benefit of) income taxes |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income (loss) from continuing operations |  |  |  |  |  |  |  |  | (3,588) | (1,174) | (769)
Loss before taxes |  |  |  |  |  |  |  |  | 0 | 0 | 0
Benefit of income taxes |  |  |  |  |  |  |  |  | 0 | 0 | 0
Loss from discontinued operations |  |  |  |  |  |  |  |  | 0 | 0 | 0
Equity in earnings from subsidiaries |  |  |  |  |  |  |  |  | (35,188) | 68,262 | 10,310
Net income (loss) |  |  |  |  |  |  |  |  | $ (38,776) | $ 67,088 | $ 9,541

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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34747878&loc=d3e3636-108311 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 4 -Article 5 + Details
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