Quarterly report pursuant to Section 13 or 15(d)

General - Carrying Amounts and Classification of Assets and Liabilities for VIEs (Detail)

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General - Carrying Amounts and Classification of Assets and Liabilities for VIEs (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Variable Interest Entity [Line Items]    
Current assets $ 927,265 $ 940,312
Noncurrent assets 394,625 399,908
Total assets 1,321,890 1,340,220
Current liabilities 264,224 292,541
Noncurrent liabilities 122,660 128,590
Total liabilities 386,884 421,131
Variable interest entity, primary beneficiary [Member] | HF Logistics-SKX, LLC [Member]
    
Variable Interest Entity [Line Items]    
Current assets 2,936 5,239
Noncurrent assets 133,050 133,235
Total assets 135,986 138,474
Current liabilities 2,184 1,958
Noncurrent liabilities 80,035 80,678
Total liabilities 82,219 82,636
Variable interest entity, primary beneficiary [Member] | Distribution joint ventures [Member]
    
Variable Interest Entity [Line Items]    
Current assets 39,228 34,781
Noncurrent assets 8,653 7,978
Total assets 47,881 42,759
Current liabilities 9,961 13,222
Noncurrent liabilities 32 34
Total liabilities $ 9,993 $ 13,256