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Finance Receivables (Tables)
3 Months Ended
Mar. 31, 2018
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
 
March 31, 2018
 
December 31, 2017
 
March 31, 2018
 
December 31, 2017
1
 
 
 
$

 
$

2
 
2
 
2
 
62,936

 
62,744

3
 
10
 
8
 
393,540

 
379,621

4
 
5
 
8
 
124,839

 
165,413

5
 
2
 
1
 
31,960

 
11,950

 
 
 
 
 
 
$
613,275

 
$
619,728