Annual report pursuant to Section 13 and 15(d)

Summary of Treasury Stock Activity (Detail)

v3.20.4
Summary of Treasury Stock Activity (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Treasury Stock Shares [Abstract]      
Beginning Balance, Shares 4,711,859 4,626,191 4,525,870
Restricted stock withholdings [1] 264,522 59,060 75,801
Restricted stock forfeitures [2] 74,600 26,608 24,520
Ending Balance, Shares 5,050,981 4,711,859 4,626,191
Beginning Balance, Cost $ 81,567 $ 79,259 $ 76,354
Restricted stock withholdings [1] 5,437 2,308 2,905
Restricted stock forfeitures [2] 0 0 0
Ending Balance, Cost $ 87,004 $ 81,567 $ 79,259
[1] The Company withheld restricted shares as a result of the election by certain employees to satisfy their tax liabilities upon vesting in restricted stock and restricted stock units.  The Company determined the number of shares to be withheld based upon market values that ranged from $8.03 to $44.44 per share.  
[2] The Company repurchased forfeited restricted shares at a cost of $0.001 per share in accordance with the 2017 Omnibus Plan.