Quarterly report pursuant to Section 13 or 15(d)

Excess Lease Liability - Additional Information (Detail)

v2.4.0.8
Excess Lease Liability - Additional Information (Detail) (Excess Lease Facility [Member], USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Excess Lease Facility [Member]
   
Restructuring Cost and Reserve [Line Items]    
Estimated value of excess lease facility liability $ 4,082 $ 4,586
Amortization of excess lease facility $ 504