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Accounting Policies (Tables)
 9 Months Ended
Sep. 30, 2013
Accounting Policies [Abstract]  
Activity and balances related to incurred but not paid workers' compensation claims
The following table provides the activity and balances related to incurred but not paid workers’ compensation claims:

 
 
Nine Months Ended 
 September 30,
 
 
2013
 
2012
 
 
(in thousands)
 
 
 
 
 
Beginning balance, January 1,
 
$
111,685

 
$
104,791

Accrued claims
 
30,496

 
28,586

Present value discount
 
(748
)
 
(712
)
Paid claims
 
(24,462
)
 
(23,133
)
Ending balance
 
$
116,971

 
$
109,532

 
 
 
 
 
Current portion of accrued claims
 
$
50,317

 
$
46,069

Long-term portion of accrued claims
 
66,654

 
63,463

 
 
$
116,971

 
$
109,532