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Consolidated Statements of Changes in Shareholders' Equity - (Unaudited) - USD ($)
$ in Thousands
Total
Cumulative Effect, Period of Adoption, Adjustment
Common Stock
Additional Paid In Capital
Retained Earnings
Retained Earnings
Cumulative Effect, Period of Adoption, Adjustment
Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2019     33,241,496        
Beginning balance at Dec. 31, 2019 $ 1,190,681 $ (10,931) $ 331 $ 482,286 $ 705,105 $ (10,931) $ 2,959
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net Income 23,123       23,123    
Other comprehensive loss, net of tax 10,106           10,106
Stock-based compensation expense 996     996      
Issuance of common stock related to options exercised, net of shares withheld for payroll taxes (in shares)     0        
Issuance of common stock related to options exercised, net of shares withheld for payroll taxes 0     0      
Vesting of time based stock awards issued at date of grant, net of shares withheld for payroll taxes (in shares)     (22,183)        
Vesting of performance based stock awards, net of shares withheld for payroll taxes (in shares)     4,126        
Time based stock awards granted (in shares)     152,184        
Issuance of common stock related to employee stock purchase plan (in shares)     4,476        
Issuance of common stock related to employee stock purchase plan 196     196      
Cash dividends declared (7,225)       (7,225)    
Common stock repurchased (in shares)     (1,182,841)        
Common stock repurchased (44,168)   $ (11) (44,157)      
Ending balance (in shares) at Mar. 31, 2020     32,197,258        
Ending balance at Mar. 31, 2020 $ 1,162,778   $ 320 439,321 710,072   13,065
Beginning balance (in shares) at Dec. 31, 2020 31,779,663   31,779,663        
Beginning balance at Dec. 31, 2020 $ 1,240,892   $ 315 427,016 798,061   15,500
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net Income 43,469       43,469    
Other comprehensive loss, net of tax (17,498)           (17,498)
Stock-based compensation expense 1,825     1,825      
Vesting of time based stock awards issued at date of grant, net of shares withheld for payroll taxes (in shares)     (16,663)        
Vesting of time based stock awards issued at date of grant, net of shares withheld for payroll taxes 0   $ 1 (1)      
Vesting of performance based stock awards, net of shares withheld for payroll taxes (in shares)     15,686        
Time based stock awards granted (in shares)     178,001        
Issuance of common stock related to employee stock purchase plan (in shares)     5,158        
Issuance of common stock related to employee stock purchase plan 139     139      
Cash dividends declared (7,932)       (7,932)    
Common stock repurchased (in shares)     (1,466)        
Common stock repurchased $ (62)   $ 0 (62)      
Ending balance (in shares) at Mar. 31, 2021 31,960,379   31,960,379        
Ending balance at Mar. 31, 2021 $ 1,260,833   $ 316 $ 428,917 $ 833,598   $ (1,998)