Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Summary of Operating Lease Exit Accruals (Detail)

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Summary of Significant Accounting Policies - Summary of Operating Lease Exit Accruals (Detail) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2013
Accounting Policies [Abstract]  
Beginning, Balance $ 32,983
Lease exit expense 2,331
Payments (6,568)
Ending, Balance $ 28,746