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Supplemental Financial Information (Schedule of Consolidating Statements of Operations) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Schedule Of Supplemental Financial Information [Line Items] |  |  |  |
Net Sales | $ 304,994 | $ 234,101 | $ 758,780 | $ 660,093
Cost of sales | 243,598 | 192,523 | 623,350 | 548,528
Gross profit | 61,396 | 41,578 | 135,430 | 111,565
Selling, general, and administrative expense | 38,002 | 23,186 | 91,865 | 78,167
Income from operations | 23,394 | 18,392 | 43,565 | 33,398
Interest expense | 3,878 | 3,657 | 11,389 | 10,988
Other income | (1,780) | (664) | (4,238) | (172)
Income before taxes | 21,296 | 15,399 | 36,414 | 22,582
Provision for income taxes | 7,664 | 5,828 | 13,158 | 8,666
Income from continuing operations | 13,632 | 9,571 | 23,256 | 13,916
Loss before taxes | 0 | (51) | (44) | (51)
Benefit of income taxes | 0 | (20) | (16) | (20)
Loss from discontinued operations | 0 | (31) | (28) | (31)
Equity in earnings from subsidiaries | 0 | 0 | 0 | 0
Net income | 13,632 | 9,540 | 23,228 | 13,885
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 | 30 | 29 | 101 | 96
Income from operations | (30) | (29) | (101) | (96)
Interest expense | 3,403 | 3,402 | 10,207 | 10,166
Other income | 16 | 42 | 4 | 36
Income before taxes | (3,449) | (3,473) | (10,312) | (10,298)
Provision for income taxes | (1,210) | (1,208) | (3,617) | (3,572)
Income from continuing operations | (2,239) | (2,265) | (6,695) | (6,726)
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 | 17,742 | 12,059 | 32,248 | 21,399
Net income | 15,503 | 9,794 | 25,553 | 14,673
Guarantor Subsidiaries |  |  |  |
Schedule Of Supplemental Financial Information [Line Items] |  |  |  |
Net Sales | 280,828 | 216,132 | 700,646 | 605,798
Cost of sales | 223,694 | 176,955 | 574,112 | 501,323
Gross profit | 57,134 | 39,177 | 126,534 | 104,475
Selling, general, and administrative expense | 33,392 | 21,592 | 83,076 | 72,986
Income from operations | 23,742 | 17,585 | 43,458 | 31,489
Interest expense | 494 | 291 | 1,254 | 927
Other income | (1,597) | (733) | (4,062) | (304)
Income before taxes | 24,845 | 18,027 | 46,266 | 30,866
Provision for income taxes | 8,514 | 6,791 | 15,949 | 11,652
Income from continuing operations | 16,331 | 11,236 | 30,317 | 19,214
Loss before taxes |  | (51) | (44) | (51)
Benefit of income taxes |  | (20) | (16) | (20)
Loss from discontinued operations |  | (31) | (28) | (31)
Equity in earnings from subsidiaries | 1,411 | 854 | 1,959 | 2,216
Net income | 17,742 | 12,059 | 32,248 | 21,399
Non-Guarantor Subsidiaries |  |  |  |
Schedule Of Supplemental Financial Information [Line Items] |  |  |  |
Net Sales | 34,565 | 22,151 | 76,732 | 68,041
Cost of sales | 28,432 | 19,496 | 65,511 | 60,163
Gross profit | 6,133 | 2,655 | 11,221 | 7,878
Selling, general, and administrative expense | 4,580 | 1,565 | 8,688 | 5,085
Income from operations | 1,553 | 1,090 | 2,533 | 2,793
Interest expense | (19) | (36) | (72) | (105)
Other income | (199) | 27 | (180) | 96
Income before taxes | 1,771 | 1,099 | 2,785 | 2,802
Provision for income taxes | 360 | 245 | 826 | 586
Income from continuing operations | 1,411 | 854 | 1,959 | 2,216
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 | 1,411 | 854 | 1,959 | 2,216
Eliminations |  |  |  |
Schedule Of Supplemental Financial Information [Line Items] |  |  |  |
Net Sales | (10,399) | (4,182) | (18,598) | (13,746)
Cost of sales | (8,528) | (3,928) | (16,273) | (12,958)
Gross profit | (1,871) | (254) | (2,325) | (788)
Selling, general, and administrative expense | 0 | 0 | 0 | 0
Income from operations | (1,871) | (254) | (2,325) | (788)
Interest expense | 0 | 0 | 0 | 0
Other income | 0 | 0 | 0 | 0
Income before taxes | (1,871) | (254) | (2,325) | (788)
Provision for income taxes | 0 | 0 | 0 | 0
Income from continuing operations | (1,871) | (254) | (2,325) | (788)
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 | (19,153) | (12,913) | (34,207) | (23,615)
Net income | $ (21,024) | $ (13,167) | $ (36,532) | $ (24,403)

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