Note 28 - Parent Company - Only Financial Statements - Condensed Balance Sheets (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Assets        
Cash $ 50,765 $ 143,067 $ 219,269 $ 81,071
Premises and equipment, net 41,778 45,339    
Goodwill 104,765 104,765 35,781  
Other assets 23,168 25,105    
Total assets 3,421,530 3,030,997 2,246,500  
Liabilities and shareholders’ equity:        
Subordinated notes 29,532 29,479    
Other liabilities 34,569 32,201    
Total liabilities 3,040,403 2,665,286    
Common stock, par value $1; authorized 100,000,000 shares; issued 21,110,968 and 20,931,416 shares as of December 31, 2016 and December 31, 2015, respectively, and outstanding of 16,939,715 and 17,071,523 as of December 31, 2016 and December 31, 2015, respectively 21,111 20,931    
Paid-in capital in excess of par value 232,806 228,814    
Less: Common stock in treasury at cost - 4,171,253 and 3,859,893 shares as of December 31, 2016 and December 31, 2015, respectively (66,950) (58,144)    
Accumulated other comprehensive loss, net of tax (2,409) (412) (11,704) (5,565)
Retained earnings 196,569 174,522    
Total shareholders’ equity 381,127 365,711 245,474 229,898
Total liabilities and shareholders’ equity 3,421,530 3,030,997    
Parent Company [Member]        
Assets        
Cash 23,663 37,992 $ 5,269 $ 5,435
Investment securities 400 404    
Investments in subsidiaries, as equity in net assets 384,751 354,148    
Premises and equipment, net 2,288 2,386    
Goodwill 245 245    
Other assets 1,435 1,704    
Total assets 412,782 396,879    
Liabilities and shareholders’ equity:        
Subordinated notes 29,532 29,479    
Other liabilities 2,123 1,689    
Total liabilities 31,655 31,168    
Common stock, par value $1; authorized 100,000,000 shares; issued 21,110,968 and 20,931,416 shares as of December 31, 2016 and December 31, 2015, respectively, and outstanding of 16,939,715 and 17,071,523 as of December 31, 2016 and December 31, 2015, respectively 21,111 20,931    
Paid-in capital in excess of par value 232,806 228,814    
Less: Common stock in treasury at cost - 4,171,253 and 3,859,893 shares as of December 31, 2016 and December 31, 2015, respectively (66,950) (58,144)    
Accumulated other comprehensive loss, net of tax (2,409) (412)    
Retained earnings 196,569 174,522    
Total shareholders’ equity 381,127 365,711    
Total liabilities and shareholders’ equity $ 412,782 $ 396,879