Capitalization	6 Months Ended
Mar. 31, 2018
Capitalization, Long-term Debt and Equity [Abstract]
Capitalization	Capitalization Common Stock. During the six months ended March 31, 2018, the Company issued 64,085 original issue shares of common stock as a result of SARs exercises, 68,534 original issue shares of common stock for restricted stock units that vested and 79,079 original issue shares of common stock for performance shares that vested. In addition, the Company issued 109,535 original issue shares of common stock for the Direct Stock Purchase and Dividend Reinvestment Plan and 55,280 original issue shares of common stock for the Company’s 401(k) plans. The Company also issued 13,833 original issue shares of common stock to the non-employee directors of the Company who receive compensation under the Company’s 2009 Non-Employee Director Equity Compensation Plan, as partial consideration for the directors’ services during the six months ended March 31, 2018. Holders of stock-based compensation awards will often tender shares of common stock to the Company for payment of applicable withholding taxes. During the six months ended March 31, 2018, 51,574 shares of common stock were tendered to the Company for such purposes. The Company considers all shares tendered as cancelled shares restored to the status of authorized but unissued shares, in accordance with New Jersey law. Current Portion of Long-Term Debt. None of the Company's long-term debt at March 31, 2018 will mature within the following twelve-month period. Current Portion of Long-Term Debt at September 30, 2017 consisted of $300.0 million of 6.50% notes scheduled to mature in April 2018. The Company redeemed these notes on October 18, 2017 for $307.0 million, plus accrued interest. The call premium was recorded to Unamortized Debt Expense on the Consolidated Balance Sheet in October 2017.

Capitalization

Common Stock. During the six months ended March 31, 2018, the Company issued 64,085 original issue shares of common stock as a result of SARs exercises, 68,534 original issue shares of common stock for restricted stock units that vested and 79,079 original issue shares of common stock for performance shares that vested. In addition, the Company issued 109,535 original issue shares of common stock for the Direct Stock Purchase and Dividend Reinvestment Plan and 55,280 original issue shares of common stock for the Company’s 401(k) plans. The Company also issued 13,833 original issue shares of common stock to the non-employee directors of the Company who receive compensation under the Company’s 2009 Non-Employee Director Equity Compensation Plan, as partial consideration for the directors’ services during the six months ended March 31, 2018. Holders of stock-based compensation awards will often tender shares of common stock to the Company for payment of applicable withholding taxes. During the six months ended March 31, 2018, 51,574 shares of common stock were tendered to the Company for such purposes. The Company considers all shares tendered as cancelled shares restored to the status of authorized but unissued shares, in accordance with New Jersey law.

Current Portion of Long-Term Debt. None of the Company's long-term debt at March 31, 2018 will mature within the following twelve-month period. Current Portion of Long-Term Debt at September 30, 2017 consisted of $300.0 million of 6.50% notes scheduled to mature in April 2018. The Company redeemed these notes on October 18, 2017 for $307.0 million, plus accrued interest. The call premium was recorded to Unamortized Debt Expense on the Consolidated Balance Sheet in October 2017.