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Operating Leases (Tables)
12 Months Ended
Dec. 31, 2015
Leases, Operating [Abstract]  
Future Minimum Annual Rentals
Future minimum annual rentals for the leased facilities and equipment, and the leased vehicles, are as follows:
 
Leased
Facilities and Equipment
 
Leased
Vehicles
 
Total
2016
$
95,789

 
27,599

 
123,388

2017
68,833

 
17,713

 
86,546

2018
44,949

 
7,827

 
52,776

2019
24,486

 
1,442

 
25,928

2020
11,492

 

 
11,492

2021 and thereafter
1,579

 

 
1,579

 
$
247,128

 
54,581

 
301,709

Rent Expense
Rent expense under all operating leases was as follows:
 
Leased
Facilities and Equipment
 
Leased
Vehicles
 
Total
2015
$
105,961

 
38,178

 
144,139

2014
$
103,294

 
35,731

 
139,025

2013
$
99,483

 
32,907

 
132,390