Earnings per Share (EPS) and Common Stock (Tables)

6 Months Ended

Mar. 31, 2026

Earnings Per Share And Common Stock [Abstract]

Earnings Per Share Basic and Diluted

The following table presents the calculation for both basic and diluted EPS:

(in thousands, except per share data)	Three months ended				Six months ended
	March 31, 2026		March 31, 2025		March 31, 2026		March 31, 2025
Net income	$	590,723	$	162,644	$	757,241	$	244,876
Weighted-average shares outstanding—Basic		118,185		120,177		118,764		120,210
Dilutive effect of restricted stock units		368		677		513		790
Weighted-average shares outstanding—Diluted		118,553		120,854		119,277		121,000
Earnings per share—Basic	$	5.00	$	1.35	$	6.38	$	2.04
Earnings per share—Diluted	$	4.98	$	1.35	$	6.35	$	2.02