Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation Plans - 2013 Omnibus Equity Incentive Plan - Additional Information (Detail)

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Stock-Based Compensation Plans - 2013 Omnibus Equity Incentive Plan - Additional Information (Detail)
9 Months Ended
Sep. 30, 2021
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vested shares 258,454
2013 Omnibus Equity Incentive Plan [Member] | Options [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of shares issued under compensation plan 0
Number of shares outstanding under compensation plan 0
2013 Omnibus Equity Incentive Plan [Member] | Restricted Stock Awards [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 1 year
2013 Omnibus Equity Incentive Plan [Member] | Restricted Stock Units [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 5 years
Vested shares 241,726
2013 Omnibus Equity Incentive Plan [Member] | SARs [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of shares issued under compensation plan 0
Number of shares outstanding under compensation plan 0
2013 Omnibus Equity Incentive Plan [Member] | Performance Shares [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of shares issued under compensation plan 0
Number of shares outstanding under compensation plan 0
2013 Omnibus Equity Incentive Plan [Member] | Performance Units [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of shares issued under compensation plan 0
Number of shares outstanding under compensation plan 0
2013 Omnibus Equity Incentive Plan [Member] | Deferred stock units [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vested shares 60,373
2013 Omnibus Equity Incentive Plan [Member] | Restricted Stock Units and Deferred Stock Units [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of common stock shares withheld to pay employee statutory withholding taxes 88,898