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Earnings Per Common Share - Additional Information (Detail) - shares
shares in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Common stock equivalents related to stock options that were anti-dilutive and excluded from diluted net income per share 124 0 12 0
Higher Than Average Market Price [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Common stock equivalents related to stock options that were anti-dilutive and excluded from diluted net income per share 0 275 0 275