Quarterly report pursuant to Section 13 or 15(d)

Excess Lease Liability - Summary of Excess Lease Facility Liability (Detail)

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Excess Lease Liability - Summary of Excess Lease Facility Liability (Detail) (Excess lease facility [Member], USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Excess lease facility [Member]
   
Restructuring Cost and Reserve [Line Items]    
Current portion of excess lease facility, Liability $ 1,097 $ 1,081
Long-term portion of excess lease facility, Liability 2,426 2,825
Liability, Total 3,523 3,906
Current portion of excess lease facility, Amortization of excess lease facility 16  
Long-term portion of excess lease facility, Amortization of excess lease facility (399)  
Amortization of excess lease facility $ (383)