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Supplemental Financial Information (Schedule of Condensed Consolidating Statements of Cash Flows) (Details) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2015 | Sep. 30, 2014
Schedule Of Supplemental Financial Information [Line Items] |  |
Net cash (used in) provided by operating activities of continuing operations | $ 44,488 | $ 18,185
Net cash used in operating activities of discontinued operations | 0 | (40)
Net cash provided by operating activities | 44,488 | 18,145
Cash paid for acquisitions | (140,620) | 0
Purchases of property, plant, and equipment | (6,822) | (19,180)
Other investing activities | 1,154 | 121
Net proceeds from sale of property and equipment | 26,392 | 5,958
Net cash used in investing activities | (119,896) | (13,101)
Long-term debt payments | (47,592) | (407)
Proceeds from long-term debt | 58,192 | 0
Purchase of treasury stock at market prices | (568) | (505)
Net proceeds from issuance of common stock | 237 | 508
Intercompany financing | 0 | 0
Excess tax benefit from stock compensation | 0 | 99
Net cash provided by (used in) financing activities | 10,269 | (305)
Effect of exchange rate changes on cash | (2,140) | (765)
Net (decrease) increase in cash and cash equivalents | (67,279) | 3,974
Cash and cash equivalents at beginning of year | 110,610 | 97,039
Cash and cash equivalents at end of period | 43,331 |
Gibraltar Industries, Inc. |  |
Schedule Of Supplemental Financial Information [Line Items] |  |
Net cash (used in) provided by operating activities of continuing operations |  | (13,297)
Net cash used in operating activities of discontinued operations |  | 0
Net cash provided by operating activities | (13,231) | (13,297)
Cash paid for acquisitions | 0 |
Purchases of property, plant, and equipment | 0 | 0
Other investing activities | 0 | 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 |
Purchase of treasury stock at market prices | (568) | (505)
Net proceeds from issuance of common stock | 237 | 508
Intercompany financing | 13,562 | 13,195
Excess tax benefit from stock compensation |  | 99
Net cash provided by (used in) financing activities | 13,231 | 13,297
Effect of exchange rate changes on cash | 0 | 0
Net (decrease) 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 |
Guarantor Subsidiaries |  |
Schedule Of Supplemental Financial Information [Line Items] |  |
Net cash (used in) provided by operating activities of continuing operations |  | 27,470
Net cash used in operating activities of discontinued operations |  | (40)
Net cash provided by operating activities | 52,060 | 27,430
Cash paid for acquisitions | (113,828) |
Purchases of property, plant, and equipment | (6,458) | (16,297)
Other investing activities | 1,154 | 121
Net proceeds from sale of property and equipment | 26,392 | 5,955
Net cash used in investing activities | (92,740) | (10,221)
Long-term debt payments | (47,592) | (407)
Proceeds from long-term debt | 58,192 |
Purchase of treasury stock at market prices | 0 | 0
Net proceeds from issuance of common stock | 0 | 0
Intercompany financing | (42,500) | (12,573)
Excess tax benefit from stock compensation |  | 0
Net cash provided by (used in) financing activities | (31,900) | (12,980)
Effect of exchange rate changes on cash | 0 | 0
Net (decrease) increase in cash and cash equivalents | (72,580) | 4,229
Cash and cash equivalents at beginning of year | 91,466 | 75,856
Cash and cash equivalents at end of period | 18,886 |
Non-Guarantor Subsidiaries |  |
Schedule Of Supplemental Financial Information [Line Items] |  |
Net cash (used in) provided by operating activities of continuing operations |  | 4,012
Net cash used in operating activities of discontinued operations |  | 0
Net cash provided by operating activities | 5,659 | 4,012
Cash paid for acquisitions | (26,792) |
Purchases of property, plant, and equipment | (364) | (2,883)
Other investing activities | 0 | 0
Net proceeds from sale of property and equipment | 0 | 3
Net cash used in investing activities | (27,156) | (2,880)
Long-term debt payments | 0 | 0
Proceeds from long-term debt | 0 |
Purchase of treasury stock at market prices | 0 | 0
Net proceeds from issuance of common stock | 0 | 0
Intercompany financing | 28,938 | (622)
Excess tax benefit from stock compensation |  | 0
Net cash provided by (used in) financing activities | 28,938 | (622)
Effect of exchange rate changes on cash | (2,140) | (765)
Net (decrease) increase in cash and cash equivalents | 5,301 | (255)
Cash and cash equivalents at beginning of year | 19,144 | 21,183
Cash and cash equivalents at end of period | 24,445 |
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 provided by operating activities | 0 | 0
Cash paid for acquisitions | 0 |
Purchases of property, plant, and equipment | 0 | 0
Other investing activities | 0 | 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 |
Purchase of treasury stock at market prices | 0 | 0
Net proceeds from issuance of common stock | 0 | 0
Intercompany financing | 0 | 0
Excess tax benefit from stock compensation |  | 0
Net cash provided by (used in) financing activities | 0 | 0
Effect of exchange rate changes on cash | 0 | 0
Net (decrease) 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 |

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