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Summary of Significant Accounting Policies (Details 6)
 12 Months Ended
Dec. 31, 2013
Leases and Leasehold Improvements  
Lease renewal term 5 years
Land and/or building | Minimum
  
Leases and Leasehold Improvements  
Lease terms 10 years
Lease renewal term 1 year
Land and/or building | Maximum
  
Leases and Leasehold Improvements  
Lease terms 15 years