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Discontinued operations | 12 Months Ended
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Dec. 31, 2015
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 entitled 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" ("Piling Business EBITDA") thresholds from the assets and liabilities sold. The Company has determined that it is very unlikely that it will realize any of the potential additional proceeds. During the year ended December 31, 2014, the Company recorded a net loss 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.
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 related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=51716988&loc=SL51721533-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=51717284&loc=SL51721665-107760 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5C -URI http://asc.fasb.org/extlink&oid=51717284&loc=SL51721675-107760 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3A -URI http://asc.fasb.org/extlink&oid=51719941&loc=SL51724579-110230 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 4A -URI http://asc.fasb.org/extlink&oid=51717284&loc=SL51721663-107760 Reference 6: 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=51719941&loc=d3e2941-110230 Reference 7: 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=51717284&loc=d3e1361-107760 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -URI http://asc.fasb.org/extlink&oid=51717284&loc=SL51721673-107760 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 3A -URI http://asc.fasb.org/extlink&oid=51717284&loc=SL51721659-107760 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5A -URI http://asc.fasb.org/extlink&oid=51717284&loc=SL51721671-107760 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5D -URI http://asc.fasb.org/extlink&oid=51717284&loc=SL51721677-107760 Reference 12: 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=51717284&loc=d3e1474-107760 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=51717284&loc=SL51721683-107760 + Details
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