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Supplemental Financial Information (Consolidating Statements Of Operations) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Net sales | $ 188,835 | $ 217,412 | $ 224,519 | $ 196,801 | $ 172,639 | $ 205,514 | $ 219,734 | $ 192,171 | $ 827,567 | $ 790,058 | $ 766,607
Cost of sales |  |  |  |  |  |  |  |  | 669,470 | 640,498 | 621,492
Gross profit | 35,452 | 41,762 | 44,706 | 36,177 | 32,125 | 40,228 | 41,726 | 35,481 | 158,097 | 149,560 | 145,115
Selling, general, and administrative expense |  |  |  |  |  |  |  |  | 113,457 | 104,671 | 108,957
Intangible asset impairment |  |  |  |  |  |  |  |  | 23,160 | 4,628 |
(Loss) income from operations | 6,153 | (6,152) | 16,283 | 5,196 | 1,196 | 15,749 | 16,293 | 7,023 | 21,480 | 40,261 | 36,158
Interest expense (income) | 3,811 | 3,828 | 3,690 | 11,160 | 4,593 | 4,688 | 4,627 | 4,674 | 22,489 | 18,582 | 19,363
Other income |  |  |  |  |  |  |  |  | (177) | (488) | (90)
(Loss) income before taxes |  |  |  |  |  |  |  |  | (832) | 22,167 | 16,885
(Benefit of) provision for income taxes |  |  |  |  |  |  |  |  | 4,797 | 9,517 | 7,669
(Loss) income from continuing operations | 4,009 | (13,727) | 7,732 | (3,643) | (3,736) | 7,022 | 7,915 | 1,449 | (5,629) | 12,650 | 9,216
(Loss) income from discontinued operations before taxes |  |  |  |  |  |  |  |  | (7) | (289) | 13,840
(Benefit of) provision for income taxes |  |  |  |  |  |  |  |  | (3) | (284) | 6,533
(Loss) income from discontinued operations |  |  |  | (4) | (188) | 279 | (9) | (87) | (4) | (5) | 7,307
Net (loss) income | 4,009 | (13,727) | 7,732 | (3,647) | (3,924) | 7,301 | 7,906 | 1,362 | (5,633) | 12,645 | 16,523
Gibraltar Industries, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |
Selling, general, and administrative expense |  |  |  |  |  |  |  |  | 171 | 23 | 75
(Loss) income from operations |  |  |  |  |  |  |  |  | (171) | (23) | (75)
Interest expense (income) |  |  |  |  |  |  |  |  | 21,214 | 17,422 | 16,874
(Loss) income before taxes |  |  |  |  |  |  |  |  | (21,385) | (17,445) | (16,949)
(Benefit of) provision for income taxes |  |  |  |  |  |  |  |  | (7,480) | (6,524) | (6,339)
(Loss) income from continuing operations |  |  |  |  |  |  |  |  | (13,905) | (10,921) | (10,610)
Equity in earnings from subsidiaries |  |  |  |  |  |  |  |  | 9,041 | 24,535 | 28,392
Net (loss) income |  |  |  |  |  |  |  |  | (4,864) | 13,614 | 17,782
Guarantor Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 758,790 | 712,279 | 683,614
Cost of sales |  |  |  |  |  |  |  |  | 610,049 | 574,647 | 551,641
Gross profit |  |  |  |  |  |  |  |  | 148,741 | 137,632 | 131,973
Selling, general, and administrative expense |  |  |  |  |  |  |  |  | 105,693 | 96,499 | 99,090
Intangible asset impairment |  |  |  |  |  |  |  |  | 1,000 | 4,628 |
(Loss) income from operations |  |  |  |  |  |  |  |  | 42,048 | 36,505 | 32,883
Interest expense (income) |  |  |  |  |  |  |  |  | 1,399 | 1,285 | 2,569
Other income |  |  |  |  |  |  |  |  | (177) | (480) | (90)
(Loss) income before taxes |  |  |  |  |  |  |  |  | 40,826 | 35,700 | 30,404
(Benefit of) provision for income taxes |  |  |  |  |  |  |  |  | 12,430 | 15,120 | 13,180
(Loss) income from continuing operations |  |  |  |  |  |  |  |  | 28,396 | 20,580 | 17,224
(Loss) income from discontinued operations before taxes |  |  |  |  |  |  |  |  | (7) | (289) | 13,621
(Benefit of) provision for income taxes |  |  |  |  |  |  |  |  | (3) | (284) | 6,432
(Loss) income from discontinued operations |  |  |  |  |  |  |  |  | (4) | (5) | 7,189
Equity in earnings from subsidiaries |  |  |  |  |  |  |  |  | (19,351) | 3,960 | 3,979
Net (loss) income |  |  |  |  |  |  |  |  | 9,041 | 24,535 | 28,392
Non-Guarantor Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 91,198 | 98,304 | 104,077
Cost of sales |  |  |  |  |  |  |  |  | 81,073 | 85,407 | 89,676
Gross profit |  |  |  |  |  |  |  |  | 10,125 | 12,897 | 14,401
Selling, general, and administrative expense |  |  |  |  |  |  |  |  | 7,593 | 8,149 | 9,792
Intangible asset impairment |  |  |  |  |  |  |  |  | 22,160 |  |
(Loss) income from operations |  |  |  |  |  |  |  |  | (19,628) | 4,748 | 4,609
Interest expense (income) |  |  |  |  |  |  |  |  | (124) | (125) | (80)
Other income |  |  |  |  |  |  |  |  |  | (8) |
(Loss) income before taxes |  |  |  |  |  |  |  |  | (19,504) | 4,881 | 4,689
(Benefit of) provision for income taxes |  |  |  |  |  |  |  |  | (153) | 921 | 828
(Loss) income from continuing operations |  |  |  |  |  |  |  |  | (19,351) | 3,960 | 3,861
(Loss) income from discontinued operations before taxes |  |  |  |  |  |  |  |  |  |  | 219
(Benefit of) provision for income taxes |  |  |  |  |  |  |  |  |  |  | 101
(Loss) income from discontinued operations |  |  |  |  |  |  |  |  |  |  | 118
Net (loss) income |  |  |  |  |  |  |  |  | (19,351) | 3,960 | 3,979
Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | (22,421) | (20,525) | (21,084)
Cost of sales |  |  |  |  |  |  |  |  | (21,652) | (19,556) | (19,825)
Gross profit |  |  |  |  |  |  |  |  | (769) | (969) | (1,259)
(Loss) income from operations |  |  |  |  |  |  |  |  | (769) | (969) | (1,259)
(Loss) income before taxes |  |  |  |  |  |  |  |  | (769) | (969) | (1,259)
(Loss) income from continuing operations |  |  |  |  |  |  |  |  | (769) | (969) | (1,259)
Equity in earnings from subsidiaries |  |  |  |  |  |  |  |  | 10,310 | (28,495) | (32,371)
Net (loss) income |  |  |  |  |  |  |  |  | $ 9,541 | $ (29,464) | $ (33,630)

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