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Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 2015
Accounting Policies [Abstract]  
Activity and balances related to incurred but not paid workers' compensation claims
The following table presents the activity and balances related to incurred but not paid workers’ compensation claims:

 
 
Three Months Ended 
 March 31,
 
 
2015
 
2014
 
 
(in thousands)
 
 
 
 
 
Beginning balance, January 1,
 
$
136,088

 
$
120,833

Accrued claims
 
15,958

 
12,453

Present value discount
 
(570
)
 
(439
)
Paid claims
 
(10,549
)
 
(9,399
)
Ending balance
 
$
140,927

 
$
123,448

 
 
 
 
 
Current portion of accrued claims
 
$
45,152

 
$
52,163

Long-term portion of accrued claims
 
95,775

 
71,285

 
 
$
140,927

 
$
123,448