Other Charges (Details) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
| Restructuring Cost and Reserve [Line Items] |
|
|
|
| Other charges |
$ 18,469
|
$ 6,692
|
|
| Impairment of PP&E held for sale |
3,791
|
0
|
$ 0
|
| Impairment of finite-lived intangible assets |
534
|
|
|
| Oil & Gas |
|
|
|
| Restructuring Cost and Reserve [Line Items] |
|
|
|
| Impairment of finite-lived intangible assets |
500
|
|
|
| Oil & Gas | Fabrication Services |
|
|
|
| Restructuring Cost and Reserve [Line Items] |
|
|
|
| Impairment of PP&E held for sale |
2,000
|
|
|
| Impairment of finite-lived intangible assets |
200
|
|
|
| Utility T&D | Construction equipment |
|
|
|
| Restructuring Cost and Reserve [Line Items] |
|
|
|
| Impairment of PP&E held for sale |
1,300
|
|
|
| Equipment and facility lease abandonment |
|
|
|
| Restructuring Cost and Reserve [Line Items] |
|
|
|
| Other charges |
8,947
|
0
|
|
| Long-lived asset impairment charges |
|
|
|
| Restructuring Cost and Reserve [Line Items] |
|
|
|
| Other charges |
3,791
|
0
|
|
| Loss on sale of corporate asset |
|
|
|
| Restructuring Cost and Reserve [Line Items] |
|
|
|
| Other charges |
2,226
|
0
|
|
| Employee severance charges |
|
|
|
| Restructuring Cost and Reserve [Line Items] |
|
|
|
| Other charges |
1,728
|
1,878
|
|
| Legal and accounting |
|
|
|
| Restructuring Cost and Reserve [Line Items] |
|
|
|
| Other charges |
1,182
|
1,401
|
|
| Accounting and legal fees associated with the restatements |
|
|
|
| Restructuring Cost and Reserve [Line Items] |
|
|
|
| Other charges |
$ 595
|
$ 3,413
|
|