National Commerce Corporation (Parent Company Only) Financial Information - Balance Sheets (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Assets        
Cash and due from banks $ 14,236 $ 2,273    
Other assets 2,953 1,682    
Total assets 1,138,426 791,781 693,359  
Liabilities and Shareholders' Equity        
Other liabilities 8,774 2,335    
Total liabilities 1,002,265 702,842    
Commitments          
Shareholders' equity:        
Additional paid-in capital 131,455 91,774    
Accumulated deficit (3,453) (8,856)    
Accumulated other comprehensive income 845 291    
Total shareholders' equity attributable to NCC 128,922 88,939    
Noncontrolling interest 7,239      
Total shareholders' equity 136,161 88,939 85,850 83,459
Total liabilities and shareholders' equity 1,138,426 791,781    
Parent Company [Member]        
Assets        
Cash and due from banks 829 805    
Investment in subsidiaries 133,909 87,609    
Other assets 1,557 535    
Total assets 136,295 88,949    
Liabilities and Shareholders' Equity        
Other liabilities 134 10    
Total liabilities 134 10    
Commitments          
Shareholders' equity:        
Common stock 75 5,730    
Additional paid-in capital 131,455 91,774    
Accumulated deficit (3,453) (8,856)    
Accumulated other comprehensive income 845 291    
Total shareholders' equity attributable to NCC 128,922 88,939    
Noncontrolling interest 7,239      
Total shareholders' equity 136,161 88,939    
Total liabilities and shareholders' equity $ 136,295 $ 88,949