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Supplemental Financial Information (Schedule Of Condensed Consolidating Statements Of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified | 6 Months Ended
--- | ---
Jun. 30, 2014 | Jun. 30, 2013
Schedule Of Supplemental Financial Information [Line Items] |  |
Net cash (used in) provided by operating activities of continuing operations | $ (3,785) | $ 5,269
Net cash used in operating activities of discontinued operations | 0 | (7)
Net cash (used in) provided by operating activities | (3,785) | 5,262
Purchases of property, plant, and equipment | (11,498) | (4,741)
Cash paid for acquisitions, net of cash acquired | 0 | (146)
Other investing activities | 121 | 0
Net proceeds from sale of property and equipment | 5,950 | 247
Net cash used in investing activities | (5,427) | (4,640)
Long-term debt payments | (407) | (205,080)
Proceeds from long-term debt | 0 | 210,000
Payment of note redemption fees | 0 | (3,702)
Purchase of treasury stock at market prices | (408) | (636)
Payment of deferred financing costs | 0 | (3,755)
Net proceeds from issuance of common stock | 404 | 336
Intercompany financing | 0 | 0
Excess tax benefit from stock compensation | 81 | 62
Net cash used in financing activities | (330) | (2,775)
Effect of exchange rate changes on cash | 260 | (1,238)
Net decrease in cash and cash equivalents | (9,282) | (3,391)
Cash and cash equivalents at beginning of year | 97,039 | 48,028
Cash and cash equivalents at end of period | 87,757 | 44,637
Gibraltar Industries, Inc. |  |
Schedule Of Supplemental Financial Information [Line Items] |  |
Net cash (used in) provided by operating activities of continuing operations |  | (2,905)
Net cash used in operating activities of discontinued operations |  | 0
Net cash (used in) provided by operating activities | (6,664) | (2,905)
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 | (408) | (636)
Payment of deferred financing costs |  | (3,755)
Net proceeds from issuance of common stock | 404 | 336
Intercompany financing | 6,587 | 4,600
Excess tax benefit from stock compensation | 81 | 62
Net cash used in financing activities | 6,664 | 2,905
Effect of exchange rate changes on cash | 0 | 0
Net decrease 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 (used in) provided by operating activities of continuing operations |  | 7,090
Net cash used in operating activities of discontinued operations |  | (7)
Net cash (used in) provided by operating activities | 272 | 7,083
Purchases of property, plant, and equipment | (9,232) | (3,533)
Cash paid for acquisitions, net of cash acquired |  | (146)
Other investing activities | 121 |
Net proceeds from sale of property and equipment | 5,947 | 247
Net cash used in investing activities | (3,164) | (3,432)
Long-term debt payments | (407) | (1,080)
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 | (6,028) | (4,095)
Excess tax benefit from stock compensation | 0 | 0
Net cash used in financing activities | (6,435) | (5,175)
Effect of exchange rate changes on cash | 0 | 0
Net decrease in cash and cash equivalents | (9,327) | (1,524)
Cash and cash equivalents at beginning of year | 75,856 | 26,163
Cash and cash equivalents at end of period | 66,529 | 24,639
Non-Guarantor Subsidiaries |  |
Schedule Of Supplemental Financial Information [Line Items] |  |
Net cash (used in) provided by operating activities of continuing operations |  | 1,084
Net cash used in operating activities of discontinued operations |  | 0
Net cash (used in) provided by operating activities | 2,607 | 1,084
Purchases of property, plant, and equipment | (2,266) | (1,208)
Cash paid for acquisitions, net of cash acquired |  | 0
Other investing activities | 0 |
Net proceeds from sale of property and equipment | 3 | 0
Net cash used in investing activities | (2,263) | (1,208)
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 | (559) | (505)
Excess tax benefit from stock compensation | 0 | 0
Net cash used in financing activities | (559) | (505)
Effect of exchange rate changes on cash | 260 | (1,238)
Net decrease in cash and cash equivalents | 45 | (1,867)
Cash and cash equivalents at beginning of year | 21,183 | 21,865
Cash and cash equivalents at end of period | 21,228 | 19,998
Eliminations |  |
Schedule Of Supplemental Financial Information [Line Items] |  |
Net cash (used in) provided by operating activities of continuing operations |  | 0
Net cash used in operating activities of discontinued operations |  | 0
Net cash (used in) 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 decrease 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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