• Filing Date: 2020-03-06
  • Form Type: 10-K
  • Description: Annual report
v3.19.3.a.u2
Stock-Based Compensation (Restricted Stock Awards) - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Restricted Stock Awards Forfeited 284,000    
Declared dividends charged to earnings $ 237,000 $ 195,000  
Retained income dividends cumulatively paid   1,887,000  
General and Administrative Personnel Expense [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Declared dividends charged to earnings 170,000 159,000  
Retained income dividends cumulatively paid   1,346,000  
Other Operating Income (Expense) [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Declared dividends charged to earnings 67,000 36,000  
Retained income dividends cumulatively paid   541,000  
Restricted Stock [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Recognized compensation expenses 5,590,000 4,111,000 $ 4,217,000
Total unrecognized compensation expense, Nonvested restricted stock arrangements granted $ 12,661,000 $ 11,199,000  
Recognition of remaining compensation expense over a weighted-average period 2 years 7 months 6 days    
Restricted Stock Awards Forfeited 299,776 56,637 23,766
Awards issued during the period 180,404 189,860 154,936
Other Than Service Based Restricted Stock Awards [Member]      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Awards issued during the period 0 0 0