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Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 2017
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,
 
 
2017
 
2016
 
 
(in thousands)
 
 
 
 
 
Beginning balance, January 1,
 
$
183,928

 
$
162,184

Accrued claims
 
16,772

 
17,787

Present value discount
 
(968
)
 
(639
)
Paid claims
 
(10,480
)
 
(8,719
)
Ending balance
 
$
189,252

 
$
170,613

 
 
 
 
 
Current portion of accrued claims
 
$
42,458

 
$
40,282

Long-term portion of accrued claims
 
146,794

 
130,331

 
 
$
189,252

 
$
170,613