Quarterly report pursuant to Section 13 or 15(d)

Investments and Fair Value Measurements - Category of Financial Instruments Not Held at Fair Value (Detail)

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Investments and Fair Value Measurements - Category of Financial Instruments Not Held at Fair Value (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Financial Assets, Carrying Amount $ 96,507 $ 100,727
Financial liabilities, Carrying Amount 46,653 52,562
Cash
    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Financial Assets, Carrying Amount 27,943 27,122
Financial Assets, Fair Value 27,943 27,122
Level I | Restricted Certificates of Deposit and Escrow
    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Financial Assets, Carrying Amount 586 1,021
Financial Assets, Fair Value 586 1,021
Level II | Borrowings Under Revolving Credit Agreement
    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Financial liabilities, Carrying Amount 3,000 3,000
Financial liabilities, Fair Value 3,000 3,000
Level II | Notes Payable
    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Financial liabilities, Carrying Amount 8,127 8,303
Financial liabilities, Fair Value $ 8,127 $ 8,303