XML 68 R36.htm IDEA: XBRL DOCUMENT v3.21.1
Earnings Per Share - Anti-dilutive Potential Shares of Common Stock Excluded from Computation of Earnings Per Share (Detail) - shares
shares in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Earnings Per Share [Abstract]    
Anti-dilutive potential shares of common stock excluded from computation of earnings per share (in shares) 148 45