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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]  
Schedule by Year of Future Minimum Lease Payments for Noncancellable Operating Leases

The following is a schedule by year of future minimum lease payments for noncancellable operating leases as of December 31, 2016 (dollars in thousands):

 

2017

   $ 216,370  

2018

     183,072  

2019

     164,231  

2020

     145,820  

2021

     133,644  

Thereafter

     406,281  
  

 

 

 

Total minimum payment required

   $ 1,249,418  
  

 

 

 
Composition of Total Rental Expense under Noncancellable

The composition of total rental expense under noncancellable operating leases consisted of the following (dollars in thousands):

 

     Year Ended December 31,  
     2016      2015      2014  

Minimum rentals

   $ 252,285      $ 236,965      $ 226,787  

Less sublease rentals

     (4,322      (4,673      (2,636
  

 

 

    

 

 

    

 

 

 
   $ 247,963      $ 232,292      $ 224,151