Quarterly report pursuant to Section 13 or 15(d)

Stock Plans - Schedule of Stock Award Activity (Detail)

v3.21.2
Stock Plans - Schedule of Stock Award Activity (Detail) - Stock Awards [Member]
9 Months Ended
Sep. 30, 2021
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Shares, Granted | shares 581
Shares, Vested | shares (581)
Weighted Average Grant Date Fair Value, Granted | $ / shares $ 32.33
Weighted Average Grant Date Fair Value, Vested | $ / shares $ 32.33