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Acquisitions | 12 Months Ended
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Dec. 31, 2015
Business Combinations [Abstract] |
Business Combination Disclosure [Text Block] | ## 2. Acquisitions #### E.S. Boulos Company On April 13, 2015, the Company acquired substantially all of the assets of E.S. Boulos Company (“ESB”), one of New England’s largest and most experienced electrical contractors with over 95 years in operation, from a subsidiary of Eversource Energy. The total consideration paid was approximately $11.4 million, subject to working capital adjustments, which was funded through existing cash resources of the Company. Headquartered in Westbrook, Maine, ESB offers construction capabilities under the Company’s T&D segment, including substation, transmission and distribution construction. ESB also provides commercial and industrial electrical construction under its C&I segment, including a wide range of commercial electrical construction services. The results of operations for ESB are included in the Company’s consolidated statement of operations and the T&D and C&I segments from the date of acquisition. Costs of approximately $0.4 million related to the acquisition were included in selling, general and administrative expenses in the consolidated statement of operations. The purchase accounting for ESB was complete as of December 31, 2015. The following table summarizes the allocation of the opening balance sheet from the date of acquisition through December 31, 2015:
(in thousands) |  | (as of acquisition date) April 13, 2015 |  | Measurement Period Adjustments |  | (adjusted acquisition amounts as of) December 31, 2015
Total consideration |  | $ | 11,374 |  |  | $ | — |  |  | $ | 11,374 |
Accounts receivable |  | $ | 10,662 |  |  | $ | — |  |  | $ | 10,662 |
Costs and estimated earnings in excess of billings on uncompleted contracts |  |  | 2,102 |  |  |  | — |  |  |  | 2,102 |
Other current assets |  |  | 59 |  |  |  | — |  |  |  | 59 |
Property and equipment |  |  | 1,778 |  |  |  | 253 |  |  |  | 2,031 |
Intangible assets |  |  | — |  |  |  | 2,068 |  |  |  | 2,068 |
Accounts payable |  |  | (3,621 | ) |  |  | — |  |  |  | (3,621 | )
Billings in excess of costs and estimated earnings on uncompleted contracts |  |  | (1,490 | ) |  |  | — |  |  |  | (1,490 | )
Other current liabilities |  |  | (437 | ) |  |  | — |  |  |  | (437 | )
Net identifiable assets |  |  | 9,053 |  |  |  | 2,321 |  |  |  | 11,374 |
Goodwill |  | $ | 2,321 |  |  | $ | (2,321 | ) |  | $ | — |
The following table summarizes the estimated fair values of identifiable intangible assets (level 3 valuations) and the related weighted average amortization periods by type as of the respective acquisition dates for the 2015 acquisitions.
(in thousands) |  | Estimated Fair Value at Acquisition Date |  | Weighted Average Amortization Period at Acquisition Date
|  | (in thousands) |  | (in years)
Customer relationships |  | $ | 1,129 |  |  |  | 12.7 |
Backlog |  |  | 244 |  |  |  | 1.0 |
Trade names |  |  | 695 |  |  |  | 15.0 |
Total intangible assets |  | $ | 2,068 |  |  |  |  |
#### High Country Line Construction, Inc. On November 24, 2015, the Company acquired all of the outstanding common stock of High Country Line Construction, Inc. (HCL). The acquisition of HCL expands the Company’s T&D construction services, predominantly in the western United States. The preliminary acquisition date fair value of consideration transferred was $1.7 million, net of cash acquired, of which $0.5 million was preliminarily allocated to goodwill. The Company’s process of valuing the acquired assets and liabilities is in its preliminary stages. Costs of approximately $0.2 million related to the acquisition were included in selling, general and administrative expenses in the consolidated statement of operations.

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- Definition The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1497-128463 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1490-128463 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1486-128463 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1500-128463 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1524-128463 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7000-128479 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4922-128472 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4934-128472 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4926-128472 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1383-128463 Reference 15: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6996-128479 + Details
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