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Deposits Deposits (Tables)
 12 Months Ended
Dec. 31, 2019
Statement of Financial Position [Abstract]  
Deposit Asset, Type [Table Text Block]
Deposits and prepaid health insurance consisted of the following:
 
December 31,
(in thousands)
2019
 
2018
 
 
 
 
Prepaid health insurance
$
9,000

 
$
9,000

Deposits – health insurance
8,100

 
6,200

Deposits – workers’ compensation
175,913

 
166,474

Deposits and prepaid health insurance
$
193,013

 
$
181,674