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Pension And Retirement Plans
3 Months Ended
Mar. 31, 2012
Pension And Retirement Plans [Abstract]  
Pension And Retirement Plans
 9.  Pension and Retirement Plans
All of the Company's plans that provide retirement and similar benefits are defined contribution plans.  These expenses include the impact of market gains and losses on assets held in deferred compensation plans.  Expenses for the Company's pension and profit-sharing plans, excess benefit plans and other similar plans are as follows (in thousands):

Three months ended
 
March 31,
 
2012
   
2011
 
$ 4,695     $ 4,082