Net Income Per Share - Reconciliation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Reconciliation of basic earnings per share ("EPS") to diluted EPS
Net income available to common stockholders	$ 88,243	$ 73,778	$ 276,389	$ 196,650
Basic weighted-average shares outstanding	42,813	43,276	43,044	43,287
Dilutive effect of potential common stock equivalents — restricted stock units	103	209	129	213
Diluted weighted-average shares outstanding	42,916	43,485	43,173	43,500
Net income per common share:
Basic	$ 2.06	$ 1.70	$ 6.42	$ 4.54
Diluted	$ 2.06	$ 1.70	$ 6.40	$ 4.52