Consolidated Balance Sheets (USD $)
Dec. 31, 2014
Dec. 31, 2013
Assets    
Cash and due from banks $ 14,236,000 $ 2,273,000
Interest-bearing deposits with banks 109,199,000 121,863,000
Cash and cash equivalents 123,435,000 124,136,000
Investment securities available-for-sale 34,932,000 47,979,000
Other investments 5,421,000 4,482,000
Mortgage loans held-for-sale 9,329,000 7,159,000
Loans, net of unearned income 888,721,000 582,002,000
Less: allowance for loan losses 9,802,000 9,119,000
Loans, net 878,919,000 572,883,000
Premises and equipment, net 27,560,000 16,181,000
Accrued interest receivable 2,193,000 1,430,000
Bank owned life insurance 10,641,000 8,247,000
Other real estate 1,008,000 845,000
Deferred tax assets, net 11,444,000 6,757,000
Goodwill 28,834,000  
Other assets 2,953,000 1,682,000
Total assets 1,138,426,000 791,781,000
Deposits:    
Noninterest-bearing demand 217,643,000 128,837,000
Interest-bearing demand 154,816,000 107,060,000
Savings and money market 392,394,000 304,071,000
Time 206,207,000 138,063,000
Total deposits 971,060,000 678,031,000
Federal Home Loan Bank advances 22,000,000 22,000,000
Accrued interest payable 431,000 476,000
Other liabilities 8,774,000 2,335,000
Total liabilities 1,002,265,000 702,842,000
Commitments      
Shareholders' equity:    
Preferred stock, 250,000 shares authorized, no shares issued or outstanding      
Additional paid-in capital 131,455,000 91,774,000
Accumulated deficit (3,453,000) (8,856,000)
Accumulated other comprehensive income 845,000 291,000
Total shareholders' equity attributable to National Commerce Corporation 128,922,000 88,939,000
Noncontrolling interest 7,239,000  
Total shareholders' equity 136,161,000 88,939,000
Total liabilities and shareholders' equity 1,138,426,000 791,781,000
Common Stock - Voting [Member]    
Shareholders' equity:    
Common stock 75,000 5,164,000
Common Stock - Non-Voting [Member]    
Shareholders' equity:    
Common stock   566,000
Core Deposits [Member]    
Assets    
Core deposit intangible, net $ 1,757,000