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Discontinued operations | 12 Months Ended
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Dec. 31, 2014
Discontinued Operations and Disposal Groups [Abstract] |
Discontinued operations | Discontinued operations In prior years, the Company disposed of two businesses, comprising the commercial and industrial construction segment, and classified their results as discontinued operations. On November 22, 2012, the Company sold its pipeline related assets and exited the pipeline business. On July 12, 2013, the Company sold its piling related assets and liabilities, excluding accounts receivable and unbilled revenue on a certain customer contract, and exited the piling, foundation, pipeline anchor and tank services businesses. The terms of the piling sale agreement entitle the Company to additional proceeds of up to $92,500 over the three years following the sale, contingent on the purchaser achieving certain "net income before interest expense, income taxes, depreciation and amortization" ("EBITDA") thresholds from the assets and liabilities sold. During the year ended December 31, 2014 the Company recorded costs of $472 to discontinued operations related to closing costs on a certain customer contract not sold to the purchaser and costs related to the review of the first year contingent proceeds. The detailed discontinued operations results for the prior year are as follows:
Year ended December 31, |  | 2013
|  | Pipeline |  |  | Piling |  |  | Total |
Revenue |  | $ | — |  |  | $ | 98,735 |  |  | $ | 98,735 |
Project costs |  | 1,321 |  |  | 79,472 |  |  | 80,793 |
Equipment costs |  | — |  |  | 1,242 |  |  | 1,242 |
Depreciation |  | — |  |  | 706 |  |  | 706 |
Gross (loss) profit |  | $ | (1,321 | ) |  | $ | 17,315 |  |  | $ | 15,994 |
General and administrative expenses |  | 312 |  |  | 6,857 |  |  | 7,169 |
Loss (gain) on disposal of assets and liabilities |  | 63 |  |  | (98,065 | ) |  | (98,002 | )
Gain on sale of inventory |  | (46 | ) |  | — |  |  | (46 | )
Amortization of intangible assets |  | — |  |  | 351 |  |  | 351 |
Operating (loss) income |  | $ | (1,650 | ) |  | $ | 108,172 |  |  | $ | 106,522 |
Interest expense |  | — |  |  | 4,758 |  |  | 4,758 |
(Loss) income before income taxes |  | $ | (1,650 | ) |  | $ | 103,414 |  |  | $ | 101,764 |
Current income tax expense |  | — |  |  | 164 |  |  | 164 |
Deferred income tax (benefit) expense |  | (510 | ) |  | 14,879 |  |  | 14,369 |
Net (loss) income |  | $ | (1,140 | ) |  | $ | 88,371 |  |  | $ | 87,231 |
Cash (used in) provided by discontinued operations during the prior year are summarized as follows:
Year ended December 31, |  | 2013
|  | Pipeline |  |  | Piling |  |  | Total |
Operating activities |  | $ | (1,587 | ) |  | $ | 47,326 |  |  | $ | 45,739 |
Investing activities |  | — |  |  | 182,836 |  |  | 182,836 |
Financing activities |  | — |  |  | (271 | ) |  | (271 | )
|  | $ | (1,587 | ) |  | $ | 229,891 |  |  | $ | 228,304 |

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- Definition The entire disclosure for the facts and circumstances leading to the completed or expected disposal, manner and timing of disposal, the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the segment in which the disposal group was reported, and the classification (whether sold or classified as held for sale) and carrying value of the assets and liabilities comprising the disposal group. Includes all disposal groups, including those classified as components of the entity (discontinued operations). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1012-107759 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1510-107760 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1020-107759 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2443-110228 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1474-107760 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1436-107760 + Details
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