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Reportable Segments (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
segment
Jun. 30, 2012
Reportable Segments        
Number of business segments     4  
Sales and other financial information by reportable segment        
Revenue from external customers $ 837,344 $ 630,735 $ 1,648,721 $ 1,245,976
Gross margin 256,659 194,335 481,939 384,117
Reconciliation of net income (loss) to gross margin        
Net income (loss) 24,504 (166,898) 83,295 (159,611)
Selling, general and administrative 91,117 94,134 176,096 188,973
Depreciation and amortization 80,751 88,909 163,397 174,020
Long-lived asset impairment 16,574 128,543 20,137 132,665
Restructuring charges   1,266   4,313
Interest expense 30,250 36,968 58,124 74,959
Equity in income of non-consolidated affiliates (4,722) (4,728) (9,387) (42,067)
Other (income) expense, net (7,239) 8,752 (17,048) 2,657
Provision for (benefit from) income taxes 23,849 (35,502) 39,000 (35,845)
(Income) loss from discontinued operations, net of tax 1,575 42,891 (31,675) 44,053
Gross margin 256,659 194,335 481,939 384,117
North America contract operations
        
Sales and other financial information by reportable segment        
Revenue from external customers 163,645 148,564 323,076 299,152
Gross margin 92,484 78,141 179,862 154,493
Reconciliation of net income (loss) to gross margin        
Gross margin 92,484 78,141 179,862 154,493
International contract operations
        
Sales and other financial information by reportable segment        
Revenue from external customers 117,872 112,628 227,430 225,414
Gross margin 67,857 65,536 131,216 134,433
Reconciliation of net income (loss) to gross margin        
Gross margin 67,857 65,536 131,216 134,433
Aftermarket services
        
Sales and other financial information by reportable segment        
Revenue from external customers 99,368 101,902 182,980 191,547
Gross margin 21,432 24,374 39,598 42,288
Reconciliation of net income (loss) to gross margin        
Gross margin 21,432 24,374 39,598 42,288
Fabrication
        
Sales and other financial information by reportable segment        
Revenue from external customers 456,459 267,641 915,235 529,863
Gross margin 74,886 26,284 131,263 52,903
Reconciliation of net income (loss) to gross margin        
Gross margin 74,886 26,284 131,263 52,903
Reportable Segments Total
        
Sales and other financial information by reportable segment        
Revenue from external customers 837,344 630,735 1,648,721 1,245,976
Gross margin 256,659 194,335 481,939 384,117
Reconciliation of net income (loss) to gross margin        
Gross margin $ 256,659 $ 194,335 $ 481,939 $ 384,117