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
Jun. 30, 2014
Dec. 31, 2013
Carrying Amount | Cash
    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Financial Assets: $ 21,438 $ 27,122
Fair Value | Cash
    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Financial Assets: 21,438 27,122
Level I | Carrying Amount | Restricted Certificates of Deposit and Escrow
    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Financial Assets: 1,022 1,021
Level I | Fair Value | Restricted Certificates of Deposit and Escrow
    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Financial Assets: 1,022 1,021
Level II | Carrying Amount | Borrowings Under Revolving Credit Agreement
    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Financial liabilities: 3,000 3,000
Level II | Carrying Amount | Notes Payable
    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Financial liabilities: 8,164 8,303
Level II | Fair Value | Borrowings Under Revolving Credit Agreement
    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Financial liabilities: 3,000 3,000
Level II | Fair Value | Notes Payable
    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Financial liabilities: $ 8,164 $ 8,303