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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Cumulative Effect, Period of Adoption, Adjustment
Common Stock
Retained earnings
Retained earnings
Cumulative Effect, Period of Adoption, Adjustment
Accumulated other comprehensive income (loss)
Accumulated other comprehensive income (loss)
Cumulative Effect, Period of Adoption, Adjustment
Treasury stock
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest   $ 0     $ 5,093   $ (5,093)  
Balances at January 1, 2018 at Dec. 31, 2017 $ 930,664   $ 573,109 $ 491,847   $ (20,390)   $ (113,902)
Balances at January 1, 2018 at Dec. 31, 2017     68,730,731         (6,661,644)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 172,595     172,595        
Other comprehensive loss (18,925)         (18,925)    
Cash dividends declared:                
Common Stock at $0.78 per share in 2018, $0.90 per share in 2019, and $0.92 per share in 2020 (69,521)     (69,521)        
Stock Issued During Period, Shares, Acquisitions     35,551,063          
Common stock issued in connection with business combinations $ 1,043,424   $ 1,043,424          
Treasury Stock, Shares, Acquired 0              
Stock Options and Warrants Acquired And Converted Pursuant To Acquisition $ 16,037   16,037          
Adjustments to Additional Paid in Capital, Other 0   (1,120)         $ 1,120
Stock Issued During Period, Shares, Other               65,354
Exercise of stock options, net of shares purchased (in shares)               32,941
Exercise of stock options, net of shares purchased (284)   (282)         $ (566)
Restricted stock awards, net of forfeitures (in shares)               175,841
Restricted stock awards, net of forfeitures (2,528)   (4,131)         $ 1,603
Share-based compensation expense 6,219   $ 6,219          
Ending Balances (in shares) at Dec. 31, 2018     104,281,794         (6,387,508)
Ending Balances at Dec. 31, 2018 2,078,249   $ 1,633,256 600,014   (44,408)   $ (110,613)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest   3,542     2,636   $ 906  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 198,075     198,075        
Other comprehensive loss 56,825         56,825    
Cash dividends declared:                
Common Stock at $0.78 per share in 2018, $0.90 per share in 2019, and $0.92 per share in 2020 (89,476)     (89,476)        
Stock Issued During Period, Shares, Acquisitions               2,601,823
Common stock issued in connection with business combinations $ 60,934   13,658         $ 47,276
Treasury Stock, Shares, Acquired (2,753,272)             (2,753,272)
Treasury Stock, Value, Acquired, Cost Method $ (66,218)             $ (66,218)
Adjustments to Additional Paid in Capital, Other 0   (7,830)         $ 7,830
Stock Issued During Period, Shares, Other               452,134
Exercise of stock options, net of shares purchased (in shares)               20,424
Exercise of stock options, net of shares purchased (90)   (264)         $ (354)
Restricted stock awards, net of forfeitures (in shares)               275,603
Restricted stock awards, net of forfeitures (2,285)   (6,018)         $ 3,733
Share-based compensation expense 7,969   $ 7,969          
Ending Balances (in shares) at Dec. 31, 2019     104,281,794         (5,790,796)
Ending Balances at Dec. 31, 2019 2,247,705   $ 1,640,771 711,249   13,323   $ (117,638)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest   $ (56,882)     (56,882)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 155,810     155,810        
Other comprehensive loss 35,341         35,341    
Cash dividends declared:                
Common Stock at $0.78 per share in 2018, $0.90 per share in 2019, and $0.92 per share in 2020 (89,748)     (89,748)        
Common stock issued in connection with business combinations $ 0              
Treasury Stock, Shares, Acquired (880,000)             (880,000)
Treasury Stock, Value, Acquired, Cost Method $ (16,686)             $ (16,686)
Exercise of stock options, net of shares purchased (in shares) 10,405             10,405
Exercise of stock options, net of shares purchased $ (72)   (140)         $ (212)
Restricted stock awards, net of forfeitures (in shares)               400,526
Restricted stock awards, net of forfeitures (1,220)   (9,362)         $ 8,142
Share-based compensation expense 7,678   $ 7,678          
Ending Balances (in shares) at Dec. 31, 2020     104,281,794         (6,259,865)
Ending Balances at Dec. 31, 2020 $ 2,282,070   $ 1,638,947 $ 720,429   $ 48,664   $ (125,970)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest         $ 56,900