Finance Receivables (Tables)
 12 Months Ended
Dec. 31, 2016
Receivables [Abstract]  
Capital Leases Net Investment In Direct Financing Leases
Net investments in direct financing leases is summarized as follows (in thousands):
 
December 31,
 
2016
 
2015
Minimum lease payments receivable
$
790,111

 
$
782,255

Unguaranteed residual value
189,692

 
175,845

 
979,803

 
958,100

Less: unearned income
(471,411
)
 
(462,536
)
 
$
508,392

 
$
495,564
Schedule of Future Minimum Lease Payments for Capital Leases
Scheduled future minimum rents, exclusive of renewals, expenses paid by tenants, and future CPI-based adjustments, under non-cancelable direct financing leases at December 31, 2016 are as follows (in thousands):
Years Ending December 31, 
 
Total
2017
 
$
56,991

2018
 
57,834

2019 (a)
 
306,381

2020
 
31,271

2021
 
31,676

Thereafter
 
305,958

Total
 
$
790,111

___________
(a)
Includes $250.0 million for a bargain purchase option that a tenant, The New York Times Company, may exercise to acquire the property it leases from us.
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 December 31,
 
Carrying Value at December 31,
Internal Credit Quality Indicator
 
2016
 
2015
 
2016
 
2015
1
 
—
 
—
 
$
—

 
$
—

2
 
2
 
1
 
61,949

 
2,264

3
 
9
 
10
 
412,075

 
429,212

4
 
5
 
4
 
65,868

 
108,132

5
 
—
 
—
 
—

 
—

 
 
 
 
 
 
$
539,892

 
$
539,608