Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2025	Mar. 31, 2024
Numerator:
Net income	$ 46,330	$ 34,763	$ 33,488	$ 24,085	$ 81,093	$ 57,573
Denominator:
Weighted average basic shares (in shares)	12,069		11,992		12,053	11,966
Dilutive effect of restricted stock and restricted stock units (in shares)	105		199		110	201
Weighted average diluted shares (in shares)	12,174		12,191		12,163	12,167
Earnings per share:
Basic (in dollars per share)	$ 3.84		$ 2.79		$ 6.73	$ 4.81
Diluted (in dollars per share)	$ 3.81		$ 2.75		$ 6.67	$ 4.73

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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+ Details