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Reorganization - Summary of Roll Forward of Activity in Reorganization Accrual (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Restructuring Cost and Reserve [Line Items] |  |  |  |
Additions | $ 314 | $ 51 | $ 1,905 | $ 1,394
Workforce Reduction [Member] |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Accrual Beginning Balance |  |  | 14 |
Additions |  |  | 1,905 |
Cash payments |  |  | (1,319) |
Accrual Ending Balance | $ 600 |  | $ 600 |

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