Stockholders' Equity (Notes)

3 Months Ended

Dec. 31, 2023

Equity, Attributable to Parent [Abstract]

Stockholders' Equity Note Disclosure [Text Block]

Stockholders' Equity and Stock-Based Compensation

Stockholders' Equity

The Company has an effective shelf registration statement, filed with the Securities and Exchange Commission in October 2021, registering $750 million of equity securities, of which $300 million was reserved for sales under the at-the-market equity offering program that became effective in November 2021. In the three months ended December 31, 2023, there were no shares of common stock issued under the Company's at-the-market equity offering program. At December 31, 2023, $748.2 million remained available for issuance under the shelf registration statement, of which $298.2 million was reserved for sales under the at-the-market equity offering program.

Restricted Stock Units (RSUs)

The Company’s Stock Incentive Plan provides for the granting of stock options and restricted stock units to executive officers, other key employees and non-management directors. Restricted stock unit awards may be based on performance (performance-based) or on service over a requisite time period (time-based). RSU equity awards represent the contingent right to receive one share of the Company’s common stock per RSU if the vesting conditions and/or performance criteria are satisfied. The RSUs have no voting rights until vested.

In the three months ended December 31, 2023, a total of 24,000 time-based RSUs were granted. The weighted average grant date fair value of these equity awards was $23.47 per unit, and they vest annually in equal installments over three years. Total stock-based compensation expense related to the Company's RSUs for the three months ended December 31, 2023 was $0.9 million compared to $0.6 million in the prior year period.