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Supplemental Financial Information (Schedule Of Consolidating Statements Of Operations) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Schedule Of Supplemental Financial Information [Line Items] |  |  |  |
Net Sales | $ 234,101 | $ 217,412 | $ 660,093 | $ 638,732
Cost of sales | 192,523 | 175,650 | 548,528 | 516,087
Gross profit | 41,578 | 41,762 | 111,565 | 122,645
Selling, general, and administrative expense | 23,186 | 24,754 | 78,167 | 84,158
Intangible asset impairment | 0 | 23,160 | 0 | 23,160
Income (loss) from operations | 18,392 | (6,152) | 33,398 | 15,327
Interest expense | 3,657 | 3,828 | 10,988 | 18,678
Other income | (664) | (66) | (172) | (141)
Income (loss) before taxes | 15,399 | (9,914) | 22,582 | (3,210)
Provision for income taxes | 5,828 | 3,813 | 8,666 | 6,428
Income (loss) from continuing operations | 9,571 | (13,727) | 13,916 | (9,638)
Loss before taxes | (51) | 0 | (51) | (7)
Benefit of income taxes | (20) | 0 | (20) | (3)
Loss from discontinued operations | (31) | 0 | (31) | (4)
Equity in earnings from subsidiaries | 0 | 0 | 0 | 0
Net income (loss) | 9,540 | (13,727) | 13,885 | (9,642)
Gibraltar Industries, Inc. |  |  |  |
Schedule Of Supplemental Financial Information [Line Items] |  |  |  |
Net Sales | 0 | 0 | 0 | 0
Cost of sales | 0 | 0 | 0 | 0
Gross profit | 0 | 0 | 0 | 0
Selling, general, and administrative expense | 29 | 4 | 96 | 188
Intangible asset impairment |  | 0 |  | 0
Income (loss) from operations | (29) | (4) | (96) | (188)
Interest expense | 3,402 | 3,486 | 10,166 | 17,768
Other income | 42 | 0 | 36 | 0
Income (loss) before taxes | (3,473) | (3,490) | (10,298) | (17,956)
Provision for income taxes | (1,208) | (1,248) | (3,572) | (6,669)
Income (loss) from continuing operations | (2,265) | (2,242) | (6,726) | (11,287)
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 | 12,059 | (11,229) | 21,399 | 2,635
Net income (loss) | 9,794 | (13,471) | 14,673 | (8,652)
Guarantor Subsidiaries |  |  |  |
Schedule Of Supplemental Financial Information [Line Items] |  |  |  |
Net Sales | 216,132 | 200,349 | 605,798 | 585,726
Cost of sales | 176,955 | 160,676 | 501,323 | 469,628
Gross profit | 39,177 | 39,673 | 104,475 | 116,098
Selling, general, and administrative expense | 21,592 | 22,933 | 72,986 | 78,373
Intangible asset impairment |  | 1,000 |  | 1,000
Income (loss) from operations | 17,585 | 15,740 | 31,489 | 36,725
Interest expense | 291 | 372 | 927 | 1,004
Other income | (733) | (66) | (304) | (141)
Income (loss) before taxes | 18,027 | 15,434 | 30,866 | 35,862
Provision for income taxes | 6,791 | 4,781 | 11,652 | 12,392
Income (loss) from continuing operations | 11,236 | 10,653 | 19,214 | 23,470
Loss before taxes | (51) |  | (51) | (7)
Benefit of income taxes | (20) |  | (20) | (3)
Loss from discontinued operations | (31) |  | (31) | (4)
Equity in earnings from subsidiaries | 854 | (21,882) | 2,216 | (20,831)
Net income (loss) | 12,059 | (11,229) | 21,399 | 2,635
Non-Guarantor Subsidiaries |  |  |  |
Schedule Of Supplemental Financial Information [Line Items] |  |  |  |
Net Sales | 22,151 | 23,060 | 68,041 | 69,565
Cost of sales | 19,496 | 20,715 | 60,163 | 62,028
Gross profit | 2,655 | 2,345 | 7,878 | 7,537
Selling, general, and administrative expense | 1,565 | 1,817 | 5,085 | 5,597
Intangible asset impairment |  | 22,160 |  | 22,160
Income (loss) from operations | 1,090 | (21,632) | 2,793 | (20,220)
Interest expense | (36) | (30) | (105) | (94)
Other income | 27 | 0 | 96 | 0
Income (loss) before taxes | 1,099 | (21,602) | 2,802 | (20,126)
Provision for income taxes | 245 | 280 | 586 | 705
Income (loss) from continuing operations | 854 | (21,882) | 2,216 | (20,831)
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 | 0
Net income (loss) | 854 | (21,882) | 2,216 | (20,831)
Eliminations |  |  |  |
Schedule Of Supplemental Financial Information [Line Items] |  |  |  |
Net Sales | (4,182) | (5,997) | (13,746) | (16,559)
Cost of sales | (3,928) | (5,741) | (12,958) | (15,569)
Gross profit | (254) | (256) | (788) | (990)
Selling, general, and administrative expense | 0 | 0 | 0 | 0
Intangible asset impairment |  | 0 |  | 0
Income (loss) from operations | (254) | (256) | (788) | (990)
Interest expense | 0 | 0 | 0 | 0
Other income | 0 | 0 | 0 | 0
Income (loss) before taxes | (254) | (256) | (788) | (990)
Provision for income taxes | 0 | 0 | 0 | 0
Income (loss) from continuing operations | (254) | (256) | (788) | (990)
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 | (12,913) | 33,111 | (23,615) | 18,196
Net income (loss) | $ (13,167) | $ 32,855 | $ (24,403) | $ 17,206

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