Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net income	$ 95,545	$ 106,292	$ 122,005	$ 166,206	$ 175,821	$ 168,239	$ 323,842	$ 510,266
Basic:
Weighted average shares (in shares)	105,340			107,855			105,950	108,630
Diluted:
Weighted average shares (in shares)	105,340			107,855			105,950	108,630
Dilutive effect of potential common shares (in shares)	470			763			500	1,000
Diluted weighted average shares (in shares)	105,810			108,618			106,450	109,630
Net income per share:
Basic (in usd per share)	$ 0.91			$ 1.54			$ 3.06	$ 4.70
Diluted (in usd per share)	$ 0.90			$ 1.53			$ 3.04	$ 4.65