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Receivables
 3 Months Ended
Mar. 31, 2017
Receivables [Abstract]  
Receivables
Receivables
Receivables consist of:
 
First
Quarter-End
 
Year-End
 
2017
 
2016
 
(In thousands)
Funds held by escrow agent related to owned mineral assets sold, net of adjustments
$
7,689

 
$
—

Other receivables and accrued interest
1,466

 
1,505

Other loans secured by real estate, average interest rates of 4.85% at first quarter-end 2017 and 4.94% at year-end 2016
9,406

 
7,452

 
18,561

 
8,957

Allowance for bad debts
(26
)
 
(26
)
 
$
18,535

 
$
8,931


Other loans secured by real estate generally are secured by a deed of trust and due within three to five years.