Fair Value Measurements (Tables)

12 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

The following table presents the Company’s financial assets and liabilities at fair value. The fair values related to the pension assets are determined using net asset value (“NAV”) as a practical expedient, or by information categorized in the fair value hierarchy level based on the inputs used to determine fair value. The reported carrying amounts of deferred compensation assets and liabilities and debt approximate their fair values. The Company uses interest rates and other relevant information generated by market transactions involving similar instruments to measure the fair value of these assets and liabilities, therefore, all are classified as Level 2 within the valuation hierarchy.

	Net Asset Value		Quoted Market Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
As of September 30, 2021
Assets:
Pension plan
Cash	$	—	$	831	$	—	$	—
Global Multi-Asset Fund	15,244		—		—		—
Government Securities	5,158		—		—		—
Liability Driven Investment	2,793		—		—		—
Guernsey Unit Trust	2,387		—		—		—
Global Absolute Return	2,225		—		—		—
Deferred compensation plan assets
Cash	—		1,251		—		—
Mutual Funds	—		17,806		—		—
Interest rate swaps	—		—		3,127		—
Foreign currency forward contracts	—		—		24		—
Liabilities:
Pension plan	—		—		(46,013)		—
Deferred compensation plan liabilities	—		—		(24,382)		—
Total return swaps—deferred compensation	—		—		(130)		—
Long‑term debt	—		—		(752,988)		—
Interest rate swaps	—		—		(303)		—
Foreign currency forward contracts	—		—		(102)		—
Commodity swaps	—		—		(19)		—
Earn-outs related to acquisitions	—		—		—		(150)
Purchase Right	—		—		—		(8,305)
As of September 30, 2020
Assets:
Pension plan
Cash	$	—	$	15,061	$	—	$	—
Government Securities	4,924		—		—		—
Liability Driven Investment	3,604		—		—		—
Guernsey Unit Trust	1,881		—		—		—
Global Absolute Return	2,060		—		—		—
Deferred compensation plan assets
Trust Assets	—		55		—		—
Insurance	—		—		19,804		—
Foreign currency forward contracts	—		—		140		—
Liabilities:
Pension plan	—		—		(47,389)		—
Deferred compensation plan liabilities	—		—		(21,439)		—
Long‑term debt	—		—		(872,441)		—
Interest rate swap	—		—		(4,669)		—
Foreign currency forward contracts	—		—		(47)		—
Earn-outs related to acquisitions	—		—		—		(295)
Option and Purchase Right	—		—		—		(7,739)

Schedule of Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation

A rollforward of the activity in the Company’s fair value of earn-outs related to acquisitions is as follows:

	Current Portion(1)		Long-term Portion(2)		Total
Balance at September 30, 2019	$	611	$	934	$	1,545
Payments	(187)		—		(187)
Reclassifications	204		—		204
Fair value adjustment	(333)		(934)		(1,267)
Balance at September 30, 2020	$	295	$	—	$	295
Acquisitions	761		—		761
Payments	(170)		—		(170)
Fair value adjustment	(736)		—		(736)
Balance at September 30, 2021	$	150	$	—	$	150

(1)    Included in Accrued expenses and other liabilities on the Consolidated Balance Sheets.

(2)    Included in Other non‑current liabilities on the Consolidated Balance Sheets.