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Earnings per Common Share - Reconciliation of Number of Common Shares Used in Calculating Basic and Diluted Net Earnings Per Share (Detail) - shares
shares in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted Average Number of Shares Outstanding, Basic 16,849 16,685 16,788 16,678
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements 105 0 171 0
Weighted Average Number of Shares Outstanding, Diluted 17,078 16,685 17,080 16,678
Anti-dilutive shares excluded from calculation 400 700 400 600
Performance Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements 125 0 120 0