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Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 2018
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:

 
 
Three Months Ended 
 March 31,
 
 
2018
 
2017
 
 
(in thousands)
 
 
 
 
 
Beginning balance, January 1,
 
$
207,630

 
$
183,928

Accrued claims
 
16,903

 
16,772

Present value discount
 
(1,692
)
 
(968
)
Paid claims
 
(9,931
)
 
(10,480
)
Ending balance
 
$
212,910

 
$
189,252

 
 
 
 
 
Current portion of accrued claims
 
$
41,137

 
$
42,458

Long-term portion of accrued claims
 
171,773

 
146,794

 
 
$
212,910

 
$
189,252