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Receivables (Tables)
 12 Months Ended
Dec. 31, 2013
Receivables [Abstract]  
Receivables
Receivables consist of:
 
At Year-End
 
2013
 
2012
 
(In thousands)
Loan secured by real estate
$
7,610

 
$
18,507

Other loans secured by real estate, average interest rate of 5.00% at year-end 2013 and 6.24% at year-end 2012
7,987

 
1,875

Joint interest billing receivables
3,896

 
2,375

Oil and gas revenue accruals
8,137

 
5,556

Other receivables and accrued interest
11,648

 
5,372

 
39,278

 
33,685

Allowance for bad debts
(26
)
 
(62
)
 
$
39,252

 
$
33,623
Estimated Accretable Yield
Estimated accretable yield is as follows:
 
At Year-End
 
2013
 
2012
 
(In thousands)
Beginning of year
$
25,149

 
$
28,926

Change in accretable yield due to change in timing of estimated cash flows
(10,950
)
 
(515
)
Interest income recognized
(5,291
)
 
(3,262
)
 
$
8,908

 
$
25,149