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Operating Leases
12 Months Ended
Dec. 31, 2014
Leases, Operating [Abstract]  
Operating Leases
OPERATING LEASES
 
The terms and expirations of our operating leases with our tenants vary. The lease agreements frequently contain options to extend the terms of leases and other terms and conditions as negotiated. We retain substantially all of the risks and benefits of ownership of the real estate assets leased to tenants.

Approximate future rentals to be received under non-cancelable operating leases in effect at December 31, 2014, assuming no new or renegotiated leases or option extensions on lease agreements, are as follows (in thousands):
Year
Amount
2015
$
163,969

2016
150,654

2017
134,588

2018
116,821

2019
94,625

2020 and thereafter
419,014

Total
$
1,079,671


 
No single tenant comprised 10% or more of our aggregate annualized effective rent as of December 31, 2014.