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Net Income Per Common Share (Tables)
 12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Reconciliation of Weighted Average Common Shares Outstanding
A reconciliation of weighted average common shares outstanding used to calculate basic and diluted net income per share follows:
202120202019
 (in thousands)
Weighted average common shares outstanding (basic)162,233 162,372 166,902 
Impact of common stock equivalents1,074 718 890 
Weighted average common shares outstanding (diluted)163,307 163,090 167,792