Net Income Per Share - Reconciliation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Reconciliation of basic earnings per share ("EPS") to diluted EPS
Net income available to common stockholders	$ 107,211	$ 93,570	$ 195,164	$ 188,145
Basic weighted-average shares outstanding	42,669	43,145	42,640	43,162
Dilutive effect of potential common stock equivalents — restricted stock units	144	95	217	144
Diluted weighted-average shares outstanding	42,813	43,240	42,857	43,306
Net income per common share:
Basic	$ 2.51	$ 2.17	$ 4.58	$ 4.36
Diluted	$ 2.50	$ 2.16	$ 4.55	$ 4.34