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Supplemental Cash Flow Information - Additional Information Relating to Cash Flow Activities (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Cash payments for:      
Interest on long-term debt and other $ 451,000 $ 4,325,000 $ 6,547,000
Income taxes, net of refunds 13,320,000 21,766,000 49,129,000
Noncash investing and financing activities:      
Insurance claims receivable associated with property, plant and equipment 249,000 546,000  
Other assets, accounts payable, other liabilities, and long-term debt associated with additions of property, plant and equipment 14,465,000 15,522,000 6,289,000
Long-term debt associated with additions of capitalized internal-use software and software development 4,011,000    
Secured term loan extinguished 66,563,000    
Debt issuance costs written off associated with secured term loan 630,000    
Prepayment premium incurred associated with secured term loan 666,000    
Debt issuance costs written off associated with 5.5% debentures     353,000
Accrued liabilities extinguished associated with 5.5% debentures     349,000
5.5% debentures converted to common stock     26,900,000
Senior Secured Notes [Member]
      
Noncash investing and financing activities:      
Debt issuance costs incurred associated with secured term loan 6,498,000    
Secured Term Loan [Member]
      
Noncash investing and financing activities:      
Debt issuance costs incurred associated with secured term loan     $ 839,000