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Restructuring and Other Items - Additional Information (Detail) | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2013 USD ($) | Jun. 30, 2012 USD ($) | Jun. 30, 2013 USD ($) | Jun. 30, 2012 USD ($) | Jun. 30, 2012 EUR (€) | Dec. 31, 2012 USD ($) | Dec. 31, 2012 1st Quarter 2011 Restructuring Plan USD ($) | Dec. 31, 2012 2012 Restructuring Plan USD ($) | Mar. 31, 2013 1st Quarter 2013 Restructuring Plan USD ($) | Jun. 30, 2013 1st Quarter 2013 Restructuring Plan USD ($) | Jun. 30, 2013 2nd Quarter 2013 Restructuring Plan USD ($) | Jun. 30, 2013 2nd Quarter 2013 Restructuring Plan USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Restructuring charges | $ 4,621,000 | $ 4,525,000 | $ 9,033,000 | $ 4,525,000 |  | $ 4,500,000 | $ 100,000 |  | $ 4,400,000 | $ 4,412,000 | $ 4,600,000 | $ 4,621,000
Lease termination and exit costs |  |  |  |  |  |  |  | 1,200,000 | 500,000 |  |  |
Resource rationalizations |  | 1,111,000 |  | 1,111,000 |  |  |  | 3,400,000 | 3,900,000 |  | 4,200,000 |
Lease termination and asset write down costs |  |  |  |  |  |  |  |  |  |  | 400,000 |
Agreement settlement charges |  |  |  | 200,000 | 160,000 |  |  |  |  |  |  |
Discretionary bonus |  | 243,000 |  | 243,000 | 194,000 |  |  |  |  |  |  |
Share-based compensation |  | $ 620,000 |  |  |  |  |  |  |  |  |  |

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