XML 125 R48.htm IDEA: XBRL DOCUMENT v3.20.4
Earnings per Common Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Earnings Per Common Share [Line Items]                      
Conversion price (in dollars per share) $ 101.38       $ 101.38       $ 101.38 $ 101.38  
Numerator — basic and diluted                      
Net income $ 55,589 $ 50,172 $ 48,174 $ 56,747 $ 29,061 $ 60,422 $ 64,598 $ 62,645 $ 210,682 $ 216,726 $ 150,611
Denominator                      
Weighted average number of common shares outstanding — basic (in shares) 34,198 35,639 36,169 36,415 36,545 36,617 36,960 36,981 35,602 36,774 37,098
Effect of dilutive restricted shares (in shares)                 763 820 729
Effect of dilutive stock options (in shares)                 419 455 491
Effect of dilutive convertible notes (in shares)                 365 62 0
Weighted average number of common shares outstanding — diluted (in shares) 35,484 37,086 37,852 38,190 38,126 37,938 38,168 38,219 37,149 38,111 38,318
Earnings per common share — basic (in dollars per share) $ 1.63 $ 1.41 $ 1.33 $ 1.56 $ 0.80 $ 1.65 $ 1.75 $ 1.69 $ 5.92 $ 5.89 $ 4.06
Earnings per common share — diluted (in dollars per share) $ 1.57 $ 1.35 $ 1.27 $ 1.49 $ 0.76 $ 1.59 $ 1.69 $ 1.64 $ 5.67 $ 5.69 $ 3.93
Stock Options And Restricted Shares                      
Denominator                      
Antidilutive stock options and restricted shares (in shares)                 66 19 175