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Consolidated Condensed Statements Of Changes In Stockholders' Equity - USD ($)
$ in Thousands
Total
Preferred Stock [Member]
Common Stock [Member]
Retained Earnings [Member]
Treasury Stock At Cost [Member]
Accumulated Other Comprehensive Income (loss) [Member]
Balance at Dec. 31, 2015   $ 0 $ 303,966 $ 507,505 $ (82,473) $ (15,643)
Net Income $ 38,684     38,684    
Other comprehensive income, net of tax:            
Unrealized net holding (loss) gain on securities available-for-sale, net of income taxes 16,032         16,032
Dividends on common shares at $1.88 per share       (28,974)    
Cash payment for fractional shares in dividend reinvestment plan     (2)      
Allocated Share-based Compensation Expense 792   792      
Balance at Jun. 30, 2016   0 304,756 517,215 (82,473) 389
Balance at Dec. 31, 2016 742,240 0 305,826 535,631 (81,472) (17,745)
Net Income 39,299     39,299    
Other comprehensive income, net of tax:            
Unrealized net holding (loss) gain on securities available-for-sale, net of income taxes 4,033         4,033
Dividends on common shares at $1.88 per share       (28,939)    
Cash payment for fractional shares in dividend reinvestment plan     (2)      
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures     (795) (197) (645)  
Allocated Share-based Compensation Expense 1,389   1,389      
Treasury Stock, Value, Acquired, Cost Method (5,425)          
Balance at Jun. 30, 2017 $ 752,248 $ 0 $ 306,418 $ 545,794 $ (86,252) $ (13,712)