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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2014
Fair Value Disclosures [Abstract]  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
     Fair Value Measurements at September 30, 2014
  Fair Value Using Fair Value Hierarchy
  as of          
AssetsSeptember 30, 2014 Level 1 Level 2 Level 3
Company-owned life insurance $1,323 $0 $1,323 $0
Company-owned life insurance - Deferred compensation assets 316  0  316  0
Other deferred compensation assets           
 Large capitalization registered investment companies 68  68  0  0
 Mid capitalization registered investment companies 6  6  0  0
 Small capitalization registered investment companies 12  12  0  0
 International developed and emerging markets registered investment           
companies 38  38  0  0
 Fixed income registered investment companies 6  6  0  0
             
Total$1,769 $130 $1,639 $0

     Fair Value Measurements at December 31, 2013
  Fair Value Using Fair Value Hierarchy
  as of          
AssetsDecember 31, 2013 Level 1 Level 2 Level 3
Company-owned life insurance $1,885 $0 $1,885 $0
Company-owned life insurance - Deferred compensation assets 409  0  409  0
Other deferred compensation assets           
 Large capitalization registered investment companies 74  74  0  0
 Mid capitalization registered investment companies 6  6  0  0
 Small capitalization registered investment companies 13  13  0  0
 International developed and emerging markets registered investment           
companies 40  40  0  0
 Fixed income registered investment companies 7  7  0  0
             
Total$2,434 $140 $2,294 $0
Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]
     Fair Value Measurements at September 30, 2014
  Fair Value Using Fair Value Hierarchy
  as of          
LiabilitiesSeptember 30, 2014 Level 1 Level 2 Level 3
Deferred compensation liabilities           
 Large capitalization registered investment companies$390 $390 $0 $0
 Mid capitalization registered investment companies 102  102  0  0
 Small capitalization registered investment companies 85  85  0  0
 International developed and emerging markets registered investment           
companies 187  187  0  0
 Fixed income registered investment companies 40  40  0  0
 Fixed general account 158  0  158  0
             
Total$962 $804 $158 $0

     Fair Value Measurements at December 31, 2013
  Fair Value Using Fair Value Hierarchy
  as of          
LiabilitiesDecember 31, 2013 Level 1 Level 2 Level 3
Deferred compensation liabilities           
 Large capitalization registered investment companies$405 $405 $0 $0
 Mid capitalization registered investment companies 109  109  0  0
 Small capitalization registered investment companies 95  95  0  0
 International developed and emerging markets registered investment           
companies 205  205  0  0
 Fixed income registered investment companies 43  43  0  0
 Fixed general account 167  0  167  0
Acquisition-related consideration 4,876  0  0  4,876
             
Total$5,900 $857 $167 $4,876
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
     Non-competition    
   Earnout Agreement    
   Summit Obligation Total 
 Balance at December 31, 2013$4,697 $179 $4,876 
  Interest accretion 12  8  20 
  Payments  (4,709)  (187)  (4,896) 
 Balance at September 30, 2014$0 $0 $0