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Supplemental Financial Information (Schedule of Consolidating Balance Sheets) (Details) - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014 | Mar. 31, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
Schedule Of Supplemental Financial Information [Line Items] |  |  |  |
Cash and cash equivalents | $ 39,422 | $ 110,610 | $ 87,757 | $ 97,039
Accounts receivable, net of reserve of $4,657 and $4,280 in 2015 and 2014 | 180,382 | 101,141 |  |
Intercompany balances | 0 | 0 |  |
Inventories | 134,751 | 128,743 |  |
Other current assets | 23,339 | 19,937 |  |
Total current assets | 377,894 | 360,431 |  |
Property, plant, and equipment, net | 124,995 | 129,575 |  |
Goodwill | 292,918 | 236,044 |  |
Acquired intangibles | 136,731 | 82,215 |  |
Other assets | 7,461 | 5,895 |  |
Investment in subsidiaries | 0 | 0 |  |
Total assets | 939,999 | 814,160 |  |
Accounts payable | 114,731 | 81,246 |  |
Accrued expenses | 92,383 | 52,439 |  |
Current maturities of long-term debt | 400 | 400 |  |
Total current liabilities | 207,514 | 134,085 |  |
Long-term debt | 242,800 | 213,200 |  |
Deferred income taxes | 54,731 | 49,772 |  |
Other non-current liabilities | 38,334 | 29,874 |  |
Total shareholders’ equity | 396,620 | 387,229 |  |
Total liabilities and shareholders' equity | 939,999 | 814,160 |  |
Gibraltar Industries, Inc. |  |  |  |
Schedule Of Supplemental Financial Information [Line Items] |  |  |  |
Cash and cash equivalents | 0 | 0 | 0 | 0
Accounts receivable, net of reserve of $4,657 and $4,280 in 2015 and 2014 | 0 | 0 |  |
Intercompany balances | (114,041) | 21,619 |  |
Inventories | 0 | 0 |  |
Other current assets | 2,448 | 4,484 |  |
Total current assets | (111,593) | 26,103 |  |
Property, plant, and equipment, net | 0 | 0 |  |
Goodwill | 0 | 0 |  |
Acquired intangibles | 0 | 0 |  |
Other assets | 2,689 | 2,931 |  |
Investment in subsidiaries | 720,452 | 573,664 |  |
Total assets | 611,548 | 602,698 |  |
Accounts payable | 0 | 0 |  |
Accrued expenses | 4,928 | 5,469 |  |
Current maturities of long-term debt | 0 | 0 |  |
Total current liabilities | 4,928 | 5,469 |  |
Long-term debt | 210,000 | 210,000 |  |
Deferred income taxes | 0 | 0 |  |
Other non-current liabilities | 0 | 0 |  |
Total shareholders’ equity | 396,620 | 387,229 |  |
Total liabilities and shareholders' equity | 611,548 | 602,698 |  |
Guarantor Subsidiaries |  |  |  |
Schedule Of Supplemental Financial Information [Line Items] |  |  |  |
Cash and cash equivalents | 17,160 | 91,466 | 66,529 | 75,856
Accounts receivable, net of reserve of $4,657 and $4,280 in 2015 and 2014 | 160,282 | 91,713 |  |
Intercompany balances | 137,658 | (1,850) |  |
Inventories | 124,810 | 120,091 |  |
Other current assets | 17,840 | 14,488 |  |
Total current assets | 457,750 | 315,908 |  |
Property, plant, and equipment, net | 110,822 | 116,628 |  |
Goodwill | 271,343 | 229,558 |  |
Acquired intangibles | 120,151 | 77,259 |  |
Other assets | 4,772 | 2,964 |  |
Investment in subsidiaries | 57,621 | 32,404 |  |
Total assets | 1,022,459 | 774,721 |  |
Accounts payable | 106,333 | 74,751 |  |
Accrued expenses | 75,842 | 45,561 |  |
Current maturities of long-term debt | 400 | 400 |  |
Total current liabilities | 182,575 | 120,712 |  |
Long-term debt | 32,800 | 3,200 |  |
Deferred income taxes | 48,744 | 47,717 |  |
Other non-current liabilities | 37,888 | 29,428 |  |
Total shareholders’ equity | 720,452 | 573,664 |  |
Total liabilities and shareholders' equity | 1,022,459 | 774,721 |  |
Non-Guarantor Subsidiaries |  |  |  |
Schedule Of Supplemental Financial Information [Line Items] |  |  |  |
Cash and cash equivalents | 22,262 | 19,144 | 21,228 | 21,183
Accounts receivable, net of reserve of $4,657 and $4,280 in 2015 and 2014 | 20,100 | 9,428 |  |
Intercompany balances | (23,617) | (19,769) |  |
Inventories | 9,941 | 8,652 |  |
Other current assets | 3,051 | 965 |  |
Total current assets | 31,737 | 18,420 |  |
Property, plant, and equipment, net | 14,173 | 12,947 |  |
Goodwill | 21,575 | 6,486 |  |
Acquired intangibles | 16,580 | 4,956 |  |
Other assets | 0 | 0 |  |
Investment in subsidiaries | 0 | 0 |  |
Total assets | 84,065 | 42,809 |  |
Accounts payable | 8,398 | 6,495 |  |
Accrued expenses | 11,613 | 1,409 |  |
Current maturities of long-term debt | 0 | 0 |  |
Total current liabilities | 20,011 | 7,904 |  |
Long-term debt | 0 | 0 |  |
Deferred income taxes | 5,987 | 2,055 |  |
Other non-current liabilities | 446 | 446 |  |
Total shareholders’ equity | 57,621 | 32,404 |  |
Total liabilities and shareholders' equity | 84,065 | 42,809 |  |
Eliminations |  |  |  |
Schedule Of Supplemental Financial Information [Line Items] |  |  |  |
Cash and cash equivalents | 0 | 0 | $ 0 | $ 0
Accounts receivable, net of reserve of $4,657 and $4,280 in 2015 and 2014 | 0 | 0 |  |
Intercompany balances | 0 | 0 |  |
Inventories | 0 | 0 |  |
Other current assets | 0 | 0 |  |
Total current assets | 0 | 0 |  |
Property, plant, and equipment, net | 0 | 0 |  |
Goodwill | 0 | 0 |  |
Acquired intangibles | 0 | 0 |  |
Other assets | 0 | 0 |  |
Investment in subsidiaries | (778,073) | (606,068) |  |
Total assets | (778,073) | (606,068) |  |
Accounts payable | 0 | 0 |  |
Accrued expenses | 0 | 0 |  |
Current maturities of long-term debt | 0 | 0 |  |
Total current liabilities | 0 | 0 |  |
Long-term debt | 0 | 0 |  |
Deferred income taxes | 0 | 0 |  |
Other non-current liabilities | 0 | 0 |  |
Total shareholders’ equity | (778,073) | (606,068) |  |
Total liabilities and shareholders' equity | $ (778,073) | $ (606,068) |  |

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