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Schedule Of Expected Future Benefit Payments (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Post-Retirement Benefit Plans
 
Schedule of Pension Expected Future Benefit Payments [Line Items]  
2013 $ 1,322
2014 1,202
2015 1,111
2016 1,106
2017 966
2018-2022 3,943
Domestic Tax Authority | Defined Benefit Pension Plans
 
Schedule of Pension Expected Future Benefit Payments [Line Items]  
2013 14,398
2014 15,283
2015 16,248
2016 17,368
2017 17,868
2018-2022 97,607
Foreign Country | Defined Benefit Pension Plans
 
Schedule of Pension Expected Future Benefit Payments [Line Items]  
2013 2,109
2014 1,499
2015 1,397
2016 2,070
2017 2,206
2018-2022 $ 10,395