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BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Duration of production and processing equipment fabrication project, minimum (in months) 3 months  
Duration of production and processing equipment fabrication project, maximum (in months) 36 months  
Summary of income (loss) attributable to Exterran stockholders    
Income (loss) from continuing operations attributable to Exterran stockholders $ 6,120 $ (27,892)
Loss from discontinued operations, net of tax (625) (2,138)
Net income (loss) attributable to Exterran stockholders $ 5,495 $ (30,030)
Potential shares of common stock that were included in computing the dilutive potential shares of common stock used in diluted income (loss) attributable to entity's stockholders per common share    
Weighted average common shares outstanding-used in basic income (loss) per common share 64,515 62,418
Net dilutive potential common shares issuable:    
On exercise of options and vesting of restricted stock units (in shares) 54  
On settlement of employee stock purchase plan shares 27  
Weighted average common shares and dilutive potential common shares-used in diluted income per common share 64,596 62,418
Anti-dilutive effect of the calculation of net dilutive potential shares of common stock issuable    
Net dilutive potential common shares issuable 23,766 23,423
On exercise of options where exercise price is greater than average market value for the period
    
Anti-dilutive effect of the calculation of net dilutive potential shares of common stock issuable    
Net dilutive potential common shares issuable 2,510 1,320
On exercise of options and vesting of restricted stock and restricted stock units
    
Anti-dilutive effect of the calculation of net dilutive potential shares of common stock issuable    
Net dilutive potential common shares issuable   836
On settlement of employee stock purchase plan shares
    
Anti-dilutive effect of the calculation of net dilutive potential shares of common stock issuable    
Net dilutive potential common shares issuable   11
On exercise of warrants
    
Anti-dilutive effect of the calculation of net dilutive potential shares of common stock issuable    
Net dilutive potential common shares issuable 2,808 2,808
On conversion of 4.25% convertible senior notes due 2014
    
Anti-dilutive effect of the calculation of net dilutive potential shares of common stock issuable    
Net dilutive potential common shares issuable 15,334 15,334
Interest rate (as a percent) 4.25% 4.25%
On conversion of 4.75% convertible senior notes due 2014
    
Anti-dilutive effect of the calculation of net dilutive potential shares of common stock issuable    
Net dilutive potential common shares issuable 3,114 3,114
Interest rate (as a percent) 4.75% 4.75%