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Reportable Segments (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
segment
Mar. 31, 2012
Reportable Segments    
Number of business segments 4  
Sales and other financial information by reportable segment    
Revenue from external customers $ 811,377 $ 615,241
Gross margin 225,280 189,783
Reconciliation of net income to gross margin    
Net income 58,791 7,287
Selling, general and administrative 84,979 94,839
Depreciation and amortization 82,646 85,111
Long-lived asset impairment 3,563 4,122
Restructuring charges   3,047
Interest expense 27,874 37,991
Equity in income of non-consolidated affiliates (4,665) (37,339)
Other (income) expense, net (9,809) (6,094)
Provision for (benefit from) income taxes 15,151 (343)
(Income) loss from discontinued operations, net of tax (33,250) 1,162
Gross margin 225,280 189,783
North America contract operations
    
Sales and other financial information by reportable segment    
Revenue from external customers 159,431 150,588
Gross margin 87,378 76,352
Reconciliation of net income to gross margin    
Gross margin 87,378 76,352
International contract operations
    
Sales and other financial information by reportable segment    
Revenue from external customers 109,558 112,786
Gross margin 63,359 68,897
Reconciliation of net income to gross margin    
Gross margin 63,359 68,897
Aftermarket services
    
Sales and other financial information by reportable segment    
Revenue from external customers 83,612 89,645
Gross margin 18,166 17,914
Reconciliation of net income to gross margin    
Gross margin 18,166 17,914
Fabrication
    
Sales and other financial information by reportable segment    
Revenue from external customers 458,776 262,222
Gross margin 56,377 26,620
Reconciliation of net income to gross margin    
Gross margin 56,377 26,620
Reportable Segments Total
    
Sales and other financial information by reportable segment    
Revenue from external customers 811,377 615,241
Gross margin 225,280 189,783
Reconciliation of net income to gross margin    
Gross margin $ 225,280 $ 189,783