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Receivables (Tables)
 6 Months Ended
Jun. 30, 2015
Receivables [Abstract]  
Receivables
Receivables consist of:
 
Second
Quarter-End
 
Year-End
 
2015
 
2014
 
(In thousands)
Oil and gas revenue accruals
$
6,673

 
$
7,293

Other receivables and accrued interest
4,171

 
6,505

Oil and gas joint interest billing receivables
2,055

 
5,738

Other loans secured by real estate, average interest rates of 10.68% at second quarter-end 2015 and 4.41% at year-end 2014
1,948

 
1,737

Loan secured by real estate
$
—

 
$
3,574

 
14,847

 
24,847

Allowance for bad debts
(237
)
 
(258
)
 
$
14,610

 
$
24,589
Estimated Accretable Yield
Estimated accretable yield follows:
 
Second
Quarter-End
 
2015
 
(In thousands)
Beginning of period (year-end 2014)
$
839

Change in accretable yield due to change in timing of estimated cash flows
30

Interest income recognized (in first six months 2015)
(869
)
End of period
$
—