Quarterly report pursuant to Section 13 or 15(d)

General (Details)

v2.4.0.6
General (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Carrying amounts and classification of assets and liabilities    
Current assets $ 944,846 $ 887,351
Noncurrent assets 395,820 394,537
Total assets 1,340,666 1,281,888
Current liabilities 375,260 308,466
Noncurrent liabilities 71,317 80,895
Total liabilities 446,577 389,361
Variable Interest Entity, Primary Beneficiary [Member]
    
Carrying amounts and classification of assets and liabilities    
Current assets 14,574 11,287
Noncurrent assets 131,428 132,925
Total assets 145,975 144,212
Current liabilities 66,749 65,608
Noncurrent liabilities 18,211 18,341
Total liabilities $ 84,960 $ 83,949