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Component: (Network and Table)
Network
2413405 - Disclosure - Stock-Based Compensation - Summary of Restricted Stock (Details)
(http://amnb.com/role/StockBasedCompensationSummaryOfRestrictedStockDetails)
TableSchedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000741516 (http://www.sec.gov/CIK)
Award Type [Axis]Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]Period [Axis]
2016-01-01 - 2016-12-31
Shares
 
Nonvested at beginning of period (in shares)
41,563  
Granted (in shares)
29,025  
Vested (in shares)
(19,219) 
Forfeited (in shares)
(547) 
Nonvested at end of period (in shares)
50,822  
 
Weighted Average Grant Date Value
 
Nonvested at beginning of period (in dollars per share)
22.15  
Granted (in dollars per share)
23.55  
Vested (in dollars per share)
21.47  
Forfeited (in dollars per share)
21.98  
Nonvested at end of period (in dollars per share)
23.21