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Supplemental Financial Information (Schedule Of Condensed Consolidating Statements Of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified | 9 Months Ended
--- | ---
Sep. 30, 2014 | Sep. 30, 2013
Schedule Of Supplemental Financial Information [Line Items] |  |
Net cash provided by operating activities of continuing operations | $ 18,185 | $ 37,916
Net cash used in operating activities of discontinued operations | (40) | (9)
Net cash provided by operating activities | 18,145 | 37,907
Purchases of property, plant, and equipment | (19,180) | (8,816)
Cash paid for acquisitions, net of cash acquired | 0 | (5,344)
Other investing activities | 121 | 0
Net proceeds from sale of property and equipment | 5,958 | 12,447
Net cash used in investing activities | (13,101) | (1,713)
Long-term debt payments | (407) | (205,084)
Proceeds from long-term debt | 0 | 210,000
Payment of note redemption fees | 0 | (3,702)
Purchase of treasury stock at market prices | (505) | (642)
Payment of deferred financing costs | 0 | (3,858)
Net proceeds from issuance of common stock | 508 | 342
Intercompany financing | 0 | 0
Excess tax benefit from stock compensation | 99 | 62
Net cash used in financing activities | (305) | (2,882)
Effect of exchange rate changes on cash | (765) | (492)
Net increase in cash and cash equivalents | 3,974 | 32,820
Cash and cash equivalents at beginning of year | 97,039 | 48,028
Cash and cash equivalents at end of period | 101,013 | 80,848
Gibraltar Industries, Inc. |  |
Schedule Of Supplemental Financial Information [Line Items] |  |
Net cash provided by operating activities of continuing operations | (13,297) | (9,040)
Net cash used in operating activities of discontinued operations | 0 | 0
Net cash provided by operating activities | (13,297) | (9,040)
Purchases of property, plant, and equipment | 0 | 0
Cash paid for acquisitions, net of cash acquired |  | 0
Other investing activities | 0 |
Net proceeds from sale of property and equipment | 0 | 0
Net cash used in investing activities | 0 | 0
Long-term debt payments | 0 | (204,000)
Proceeds from long-term debt |  | 210,000
Payment of note redemption fees |  | (3,702)
Purchase of treasury stock at market prices | (505) | (642)
Payment of deferred financing costs |  | (3,858)
Net proceeds from issuance of common stock | 508 | 342
Intercompany financing | 13,195 | 10,838
Excess tax benefit from stock compensation | 99 | 62
Net cash used in financing activities | 13,297 | 9,040
Effect of exchange rate changes on cash | 0 | 0
Net increase in cash and cash equivalents | 0 | 0
Cash and cash equivalents at beginning of year | 0 | 0
Cash and cash equivalents at end of period | 0 | 0
Guarantor Subsidiaries |  |
Schedule Of Supplemental Financial Information [Line Items] |  |
Net cash provided by operating activities of continuing operations | 27,470 | 44,203
Net cash used in operating activities of discontinued operations | (40) | (9)
Net cash provided by operating activities | 27,430 | 44,194
Purchases of property, plant, and equipment | (16,297) | (6,196)
Cash paid for acquisitions, net of cash acquired |  | (5,344)
Other investing activities | 121 |
Net proceeds from sale of property and equipment | 5,955 | 12,434
Net cash used in investing activities | (10,221) | 894
Long-term debt payments | (407) | (1,084)
Proceeds from long-term debt |  | 0
Payment of note redemption fees |  | 0
Purchase of treasury stock at market prices | 0 | 0
Payment of deferred financing costs |  | 0
Net proceeds from issuance of common stock | 0 | 0
Intercompany financing | (12,573) | (10,211)
Excess tax benefit from stock compensation | 0 | 0
Net cash used in financing activities | (12,980) | (11,295)
Effect of exchange rate changes on cash | 0 | 0
Net increase in cash and cash equivalents | 4,229 | 33,793
Cash and cash equivalents at beginning of year | 75,856 | 26,163
Cash and cash equivalents at end of period | 80,085 | 59,956
Non-Guarantor Subsidiaries |  |
Schedule Of Supplemental Financial Information [Line Items] |  |
Net cash provided by operating activities of continuing operations | 4,012 | 2,753
Net cash used in operating activities of discontinued operations | 0 | 0
Net cash provided by operating activities | 4,012 | 2,753
Purchases of property, plant, and equipment | (2,883) | (2,620)
Cash paid for acquisitions, net of cash acquired |  | 0
Other investing activities | 0 |
Net proceeds from sale of property and equipment | 3 | 13
Net cash used in investing activities | (2,880) | (2,607)
Long-term debt payments | 0 | 0
Proceeds from long-term debt |  | 0
Payment of note redemption fees |  | 0
Purchase of treasury stock at market prices | 0 | 0
Payment of deferred financing costs |  | 0
Net proceeds from issuance of common stock | 0 | 0
Intercompany financing | (622) | (627)
Excess tax benefit from stock compensation | 0 | 0
Net cash used in financing activities | (622) | (627)
Effect of exchange rate changes on cash | (765) | (492)
Net increase in cash and cash equivalents | (255) | (973)
Cash and cash equivalents at beginning of year | 21,183 | 21,865
Cash and cash equivalents at end of period | 20,928 | 20,892
Eliminations |  |
Schedule Of Supplemental Financial Information [Line Items] |  |
Net cash provided by operating activities of continuing operations | 0 | 0
Net cash used in operating activities of discontinued operations | 0 | 0
Net cash provided by operating activities | 0 | 0
Purchases of property, plant, and equipment | 0 | 0
Cash paid for acquisitions, net of cash acquired |  | 0
Other investing activities | 0 |
Net proceeds from sale of property and equipment | 0 | 0
Net cash used in investing activities | 0 | 0
Long-term debt payments | 0 | 0
Proceeds from long-term debt |  | 0
Payment of note redemption fees |  | 0
Purchase of treasury stock at market prices | 0 | 0
Payment of deferred financing costs |  | 0
Net proceeds from issuance of common stock | 0 | 0
Intercompany financing | 0 | 0
Excess tax benefit from stock compensation | 0 | 0
Net cash used in financing activities | 0 | 0
Effect of exchange rate changes on cash | 0 | 0
Net increase in cash and cash equivalents | 0 | 0
Cash and cash equivalents at beginning of year | 0 | 0
Cash and cash equivalents at end of period | $ 0 | $ 0

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