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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($)
$ in Thousands
Total
Impact of the adoption of new accounting standards
Adjusted balance at beginning of period
Common Shares Outstanding
Common Stock
Common Stock
Adjusted balance at beginning of period
Additional Paid-In Capital
Additional Paid-In Capital
Adjusted balance at beginning of period
Accum. Deficit
Accum. Deficit
Impact of the adoption of new accounting standards
Accum. Deficit
Adjusted balance at beginning of period
Accum. Other Comp. Income (Loss)
Accum. Other Comp. Income (Loss)
Impact of the adoption of new accounting standards
 [1]
Accum. Other Comp. Income (Loss)
Adjusted balance at beginning of period
Non- Controlling Interest
Non- Controlling Interest
Adjusted balance at beginning of period
Increase (Decrease) in Shareholders' Equity                                
Adjusted balance (in shares)       28,967,715                        
Balance at beginning of period at Dec. 31, 2018 $ 491,725 $ (3,100) [1] $ 488,625   $ 470,660 $ 470,660 $ 88,876 $ 88,876 $ (51,718)   $ (51,718) $ (16,093) $ (3,100) $ (19,193) $ 0 $ 0
Balance (in shares) at Dec. 31, 2018       28,967,715                        
Increase (Decrease) in Shareholders' Equity                                
Net income 16,037               16,037              
Other comprehensive income 11,238                     11,238        
Cash dividends declared (6,052)               (6,052)              
Common stock repurchased and retired and other related costs (7,708)       (7,708)                      
Shares of common stock repurchased and other related costs (in shares)       (277,000)                        
Share-based compensation 498           498                  
Share-based compensation (in shares)       32,326                        
Balance at end of period at Mar. 31, 2019 502,638       462,952   89,374   (41,733)     (7,955)     0  
Balance (in shares) at Mar. 31, 2019       28,723,041                        
Balance at beginning of period at Dec. 31, 2018 491,725 (3,100) [1] 488,625   470,660 470,660 88,876 88,876 (51,718)   (51,718) (16,093) (3,100) (19,193) 0 0
Balance (in shares) at Dec. 31, 2018       28,967,715                        
Increase (Decrease) in Shareholders' Equity                                
Net income 44,125                              
Other comprehensive income 28,320                     28,320        
Balance at end of period at Sep. 30, 2019 525,227       452,278   90,604   (26,782)     9,127     0  
Balance (in shares) at Sep. 30, 2019       28,441,341                        
Balance at beginning of period at Dec. 31, 2018 491,725 (3,100) [1] 488,625   470,660 470,660 88,876 88,876 (51,718)   (51,718) (16,093) $ (3,100) (19,193) 0 0
Balance (in shares) at Dec. 31, 2018       28,967,715                        
Balance at end of period at Dec. 31, 2019 $ 528,520 (3,156) [2] 525,364   447,602 447,602 91,611 91,611 (19,102) $ (3,156) (22,258) 8,409   8,409 0 0
Balance (in shares) at Dec. 31, 2019 28,289,257     28,289,257                        
Increase (Decrease) in Shareholders' Equity                                
Accounting Standards Update [Extensible List] us-gaap:AccountingStandardsUpdate201613Member                              
Balance at beginning of period at Mar. 31, 2019 $ 502,638       462,952   89,374   (41,733)     (7,955)     0  
Balance (in shares) at Mar. 31, 2019       28,723,041                        
Increase (Decrease) in Shareholders' Equity                                
Net income 13,534               13,534              
Other comprehensive income 12,413                     12,413        
Cash dividends declared (6,581)               (6,581)              
Common stock repurchased and retired and other related costs (6,243)       (6,243)                      
Shares of common stock repurchased and other related costs (in shares)       (213,700)                        
Common stock purchased by directors' deferred compensation plan (net shares) (416)       (416)                      
Share-based compensation 350           350               0  
Share-based compensation (in shares)       58,436                        
Balance at end of period at Jun. 30, 2019 515,695       456,293   89,724   (34,780)     4,458     0  
Balance (in shares) at Jun. 30, 2019       28,567,777                        
Increase (Decrease) in Shareholders' Equity                                
Net income 14,554               14,554              
Other comprehensive income 4,669                     4,669        
Cash dividends declared (6,556)               (6,556)              
Common stock repurchased and retired and other related costs (4,015)       (4,015)                      
Shares of common stock repurchased and other related costs (in shares)       (140,600)                        
Share-based compensation 880           880                  
Share-based compensation (in shares)       14,164                        
Balance at end of period at Sep. 30, 2019 525,227       452,278   90,604   (26,782)     9,127     0  
Balance (in shares) at Sep. 30, 2019       28,441,341                        
Increase (Decrease) in Shareholders' Equity                                
Adjusted balance (in shares)       28,289,257                        
Balance at beginning of period at Dec. 31, 2019 $ 528,520 (3,156) [2] 525,364   447,602 447,602 91,611 91,611 (19,102) (3,156) (22,258) 8,409   8,409 0 0
Balance (in shares) at Dec. 31, 2019 28,289,257     28,289,257                        
Increase (Decrease) in Shareholders' Equity                                
Net income $ 8,326               8,326              
Other comprehensive income 10,663                     10,663        
Cash dividends declared (6,496)               (6,496)              
Common stock repurchased and retired and other related costs (4,749)       (4,749)                      
Shares of common stock repurchased and other related costs (in shares)       (206,802)                        
Share-based compensation 673           673                  
Share-based compensation (in shares)       32,898                        
Non-controlling interest 49                           49  
Balance at end of period at Mar. 31, 2020 533,830       442,853   92,284   (20,428)     19,072     49  
Balance (in shares) at Mar. 31, 2020       28,115,353                        
Balance at beginning of period at Dec. 31, 2019 $ 528,520 $ (3,156) [2] $ 525,364   447,602 $ 447,602 91,611 $ 91,611 (19,102) $ (3,156) $ (22,258) 8,409   $ 8,409 0 $ 0
Balance (in shares) at Dec. 31, 2019 28,289,257     28,289,257                        
Increase (Decrease) in Shareholders' Equity                                
Net income $ 25,102                              
Other comprehensive income 15,132                     15,132        
Balance at end of period at Sep. 30, 2020 $ 543,942       442,635   94,336   (16,609)     23,541     39  
Balance (in shares) at Sep. 30, 2020 28,179,798     28,179,798                        
Balance at beginning of period at Mar. 31, 2020 $ 533,830       442,853   92,284   (20,428)     19,072     49  
Balance (in shares) at Mar. 31, 2020       28,115,353                        
Increase (Decrease) in Shareholders' Equity                                
Net income 9,917               9,917              
Other comprehensive income 6,479                     6,479        
Cash dividends declared (6,475)               (6,475)              
Common stock purchased by directors' deferred compensation plan (net shares) (154)       (154)                      
Share-based compensation 723           723                  
Share-based compensation (in shares)       38,806                        
Non-controlling interest (14)                           (14)  
Balance at end of period at Jun. 30, 2020 544,306       442,699   93,007   (16,986)     25,551     35  
Balance (in shares) at Jun. 30, 2020       28,154,159                        
Increase (Decrease) in Shareholders' Equity                                
Net income 6,859               6,859              
Other comprehensive income (2,010)                     (2,010)        
Cash dividends declared (6,482)               (6,482)              
Common stock purchased by directors' deferred compensation plan (net shares) (64)       (64)                      
Share-based compensation 1,329           1,329                  
Share-based compensation (in shares)       25,639                        
Non-controlling interest 4                           4  
Balance at end of period at Sep. 30, 2020 $ 543,942       $ 442,635   $ 94,336   $ (16,609)     $ 23,541     $ 39  
Balance (in shares) at Sep. 30, 2020 28,179,798     28,179,798                        
[1] (2) Represents the impact of the adoption of ASU 2017-12.
[2] (1) Represents the impact of the adoption of Accounting Standards Update ("ASU") ASU 2016-13. See Note 2 to the consolidated financial statements for additional information.