Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) - USD ($) $ in Thousands		Jul. 07, 2019	Sep. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities at fair value		$ 31,012	$ 38,150
Quoted Prices In Active Markets For Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities at fair value	[1]	31,012	37,447
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities at fair value	[1]	0	703
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities at fair value		0	0
Interest Rate Swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities at fair value	[2]		703
Interest Rate Swaps | Quoted Prices In Active Markets For Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities at fair value			0
Interest Rate Swaps | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities at fair value	[1],[2]		703
Interest Rate Swaps | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities at fair value			0
Non Qualified Deferred Compensation Plan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities at fair value	[3]	31,012	37,447
Non Qualified Deferred Compensation Plan | Quoted Prices In Active Markets For Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities at fair value	[1],[3]	31,012	37,447
Non Qualified Deferred Compensation Plan | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities at fair value		0	0
Non Qualified Deferred Compensation Plan | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities at fair value		$ 0	$ 0

[1] We did not have any transfers in or out of Level 1, 2 or 3.

[2] We entered into interest rate swaps to reduce our exposure to rising interest rates on our variable rate debt. The fair values of our interest rate swaps are based upon Level 2 inputs which include valuation models as reported by our counterparties. These valuation models use a discounted cash flow analysis on the cash flows of each derivative. The key inputs for the valuation models are quoted market prices, discount rates, and forward yield curves. The Company also considers its own nonperformance risk and the respective counter-party’s nonperformance risk in the fair value measurements. As further described in Note 7, Derivatives, the Company’s interest rate swaps were terminated on July 2, 2019 and settled in connection with our refinancing transaction on July 8, 2019.

[3] We maintain an unfunded defined contribution plan for key executives and other members of management. The fair value of this obligation is based on the closing market prices of the participants’ elected investments. The obligation is included in “Accrued liabilities” and “Other long-term liabilities” on our condensed consolidated balance sheets.