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Income Taxes Recognized During Period (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
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Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Reconciliation of Provision of Income Taxes [Line Items] |  |  |  |
Provision for income taxes before restructuring and other items | $ 4,315 | $ 3,514 | $ 9,336 | $ 6,240
Tax impact of restructuring and other items | (595) | (705) | (1,850) | (705)
Provision for income taxes after restructuring and other items | $ 3,720 | $ 2,809 | $ 7,486 | $ 5,535

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