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Reportable Segments and Geographic Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 segment | Dec. 31, 2012 | Dec. 31, 2011
Reportable Segments and Geographic Information |  |  |  |  |  |  |  |  |  |  |
Number of business segments |  |  |  |  |  |  |  |  | 4 |  |
Sales and other financial information by reportable segment |  |  |  |  |  |  |  |  |  |  |
Revenue from external customers | $ 739,018 | $ 775,584 | $ 835,906 | $ 809,896 | $ 837,067 | $ 716,684 | $ 628,580 | $ 611,915 | $ 3,160,404 | $ 2,794,246 | $ 2,612,625
Gross margin |  |  |  |  |  |  |  |  | 963,006 | 829,408 | 720,414
Total assets | 4,227,157 |  |  |  | 4,254,847 |  |  |  | 4,227,157 | 4,254,847 |
Capital expenditures |  |  |  |  |  |  |  |  | 391,725 | 428,731 | 272,150
Continuing Operations |  |  |  |  |  |  |  |  |  |  |
Sales and other financial information by reportable segment |  |  |  |  |  |  |  |  |  |  |
Total assets | 4,205,797 |  |  |  | 4,204,500 |  |  |  | 4,205,797 | 4,204,500 | 4,176,571
Reportable Segments |  |  |  |  |  |  |  |  |  |  |
Sales and other financial information by reportable segment |  |  |  |  |  |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 370,638 | 412,537 | 264,755
Reportable Segments | Continuing Operations |  |  |  |  |  |  |  |  |  |  |
Sales and other financial information by reportable segment |  |  |  |  |  |  |  |  |  |  |
Total assets | 3,285,986 |  |  |  | 3,327,566 |  |  |  | 3,285,986 | 3,327,566 | 3,321,620
Other |  |  |  |  |  |  |  |  |  |  |
Sales and other financial information by reportable segment |  |  |  |  |  |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 21,087 | 16,194 | 7,395
Other | Continuing Operations |  |  |  |  |  |  |  |  |  |  |
Sales and other financial information by reportable segment |  |  |  |  |  |  |  |  |  |  |
Total assets | 919,811 |  |  |  | 876,934 |  |  |  | 919,811 | 876,934 | 854,951
North America Contract Operations |  |  |  |  |  |  |  |  |  |  |
Sales and other financial information by reportable segment |  |  |  |  |  |  |  |  |  |  |
Revenue from external customers |  |  |  |  |  |  |  |  | 627,844 | 596,011 | 570,780
Gross margin |  |  |  |  |  |  |  |  | 345,355 | 311,308 | 276,971
North America Contract Operations | Reportable Segments |  |  |  |  |  |  |  |  |  |  |
Sales and other financial information by reportable segment |  |  |  |  |  |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 275,408 | 247,021 | 182,143
North America Contract Operations | Reportable Segments | Continuing Operations |  |  |  |  |  |  |  |  |  |  |
Sales and other financial information by reportable segment |  |  |  |  |  |  |  |  |  |  |
Total assets | 1,907,097 |  |  |  | 1,841,755 |  |  |  | 1,907,097 | 1,841,755 | 1,958,306
International Contract Operations |  |  |  |  |  |  |  |  |  |  |
Sales and other financial information by reportable segment |  |  |  |  |  |  |  |  |  |  |
Revenue from external customers |  |  |  |  |  |  |  |  | 476,016 | 463,957 | 445,059
Gross margin |  |  |  |  |  |  |  |  | 279,072 | 279,349 | 260,654
International Contract Operations | Reportable Segments |  |  |  |  |  |  |  |  |  |  |
Sales and other financial information by reportable segment |  |  |  |  |  |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 66,116 | 138,694 | 58,767
International Contract Operations | Reportable Segments | Continuing Operations |  |  |  |  |  |  |  |  |  |  |
Sales and other financial information by reportable segment |  |  |  |  |  |  |  |  |  |  |
Total assets | 820,686 |  |  |  | 918,187 |  |  |  | 820,686 | 918,187 | 887,046
Aftermarket Services |  |  |  |  |  |  |  |  |  |  |
Sales and other financial information by reportable segment |  |  |  |  |  |  |  |  |  |  |
Revenue from external customers |  |  |  |  |  |  |  |  | 395,600 | 385,861 | 371,327
Gross margin |  |  |  |  |  |  |  |  | 86,182 | 82,271 | 59,567
Aftermarket Services | Reportable Segments |  |  |  |  |  |  |  |  |  |  |
Sales and other financial information by reportable segment |  |  |  |  |  |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 2,082 | 3,304 | 1,768
Aftermarket Services | Reportable Segments | Continuing Operations |  |  |  |  |  |  |  |  |  |  |
Sales and other financial information by reportable segment |  |  |  |  |  |  |  |  |  |  |
Total assets | 101,667 |  |  |  | 98,104 |  |  |  | 101,667 | 98,104 | 92,169
Fabrication |  |  |  |  |  |  |  |  |  |  |
Sales and other financial information by reportable segment |  |  |  |  |  |  |  |  |  |  |
Revenue from external customers |  |  |  |  |  |  |  |  | 1,660,944 | 1,348,417 | 1,225,459
Gross margin |  |  |  |  |  |  |  |  | 252,397 | 156,480 | 123,222
Fabrication | Reportable Segments |  |  |  |  |  |  |  |  |  |  |
Sales and other financial information by reportable segment |  |  |  |  |  |  |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  | 27,032 | 23,518 | 22,077
Fabrication | Reportable Segments | Continuing Operations |  |  |  |  |  |  |  |  |  |  |
Sales and other financial information by reportable segment |  |  |  |  |  |  |  |  |  |  |
Total assets | $ 456,536 |  |  |  | $ 469,520 |  |  |  | $ 456,536 | $ 469,520 | $ 384,099

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