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
Sep. 30, 2013
Dec. 31, 2012
Variable Interest Entity [Line Items]    
Current assets $ 968,748 $ 940,312
Noncurrent assets 389,075 399,908
Total assets 1,357,823 1,340,220
Current liabilities 272,798 292,541
Noncurrent liabilities 119,945 128,590
Total liabilities 392,743 421,131
Variable interest entity, primary beneficiary [Member] | HF Logistics-SKX, LLC [Member]
    
Variable Interest Entity [Line Items]    
Current assets 2,908 5,239
Noncurrent assets 131,668 133,235
Total assets 134,576 138,474
Current liabilities 2,426 1,958
Noncurrent liabilities 79,713 80,678
Total liabilities 82,139 82,636
Variable interest entity, primary beneficiary [Member] | Distribution joint ventures [Member]
    
Variable Interest Entity [Line Items]    
Current assets 45,498 34,781
Noncurrent assets 8,818 7,978
Total assets 54,316 42,759
Current liabilities 12,930 13,222
Noncurrent liabilities 32 34
Total liabilities $ 12,962 $ 13,256