Annual report pursuant to Section 13 and 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
12 Months Ended
Dec. 31, 2013
Excess lease facility [Member]
 
Restructuring Cost and Reserve [Line Items]  
Current portion of excess lease facility, Liability, Beginning Balance $ 1,050
Long-term portion of excess lease facility, Liability, Beginning Balance 3,536
Liability, Total, Beginning Balance 4,586
Current portion of excess lease facility, Amortization of excess lease facility 31
Long-term portion of excess lease facility, Amortization of excess lease facility (711)
Amortization of excess lease facility (680)
Current portion of excess lease facility, Liability, Ending Balance 1,081
Long-term portion of excess lease facility, Liability, Ending Balance 2,825
Liability, Total, Ending Balance $ 3,906