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Finance Receivables (Tables)
 6 Months Ended
Jun. 30, 2017
Receivables [Abstract]  
Financing Receivable Credit Quality Indicators
A summary of our finance receivables by internal credit quality rating is as follows (dollars in thousands):
 
 
Number of Tenants/Obligors at
 
Carrying Value at
Internal Credit Quality Indicator
 
June 30, 2017
 
December 31, 2016
 
June 30, 2017
 
December 31, 2016
1
 
—
 
1
 
$
—

 
$
10,516

2
 
1
 
1
 
9,193

 
9,154

3
 
2
 
2
 
29,698

 
29,679

4
 
3
 
3
 
66,824

 
66,747

5
 
—
 
—
 
—

 
—

 
 
0
 
 
 
$
105,715

 
$
116,096