Fair Value Measurements and Derivatives Instruments (Tables)

3 Months Ended

Dec. 31, 2018

Derivative Instruments Gain Loss [Line Items]

Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis

The following tables summarize the financial assets and liabilities measured at fair value on a recurring basis as of December 31, 2018 and September 30, 2018:

	December 31, 2018
	Carrying Value		Level 1		Level 2		Level 3
Other assets:
Investments held by Rabbi Trust	$	10,935	$	10,935	$	—	$	—
Total assets	$	10,935	$	10,935	$	—	$	—
Accrued expenses and other current liabilities:
Interest rate swap contracts	$	1,780	$	—	$	1,780	$	—
Other liabilities:
Interest rate swap contracts		16,199		—		16,199		—
Obligation to Rabbi Trust		10,935		10,935		—		—
Total liabilities	$	28,914	$	10,935	$	17,979	$	—

	September 30, 2018
	Carrying Value		Level 1		Level 2		Level 3
Other assets:
Investments held by Rabbi Trust	$	12,517	$	12,517	$	—	$	—
Total assets	$	12,517	$	12,517	$	—	$	—
Accrued expenses and other current liabilities:
Interest rate swap contracts	$	3,441	$	—	$	3,441	$	—
Other liabilities:
Interest rate swap contracts		12,098		—		12,098		—
Obligation to Rabbi Trust		12,517		12,517		—		—
Total liabilities	$	28,056	$	12,517	$	15,539	$	—

Interest Rate Swaps

Derivative Instruments Gain Loss [Line Items]

Summary of Effects on Consolidated Financial Statements of Designated As Cash Flow Hedges

The effects on the consolidated financial statements of the interest rate swaps which were designated as cash flow hedges were as follows:

	Three Months Ended December 31,
	2018			2017
(Loss) income recognized in Other comprehensive income	$	(4,157	)	$	2,867
Net loss reclassified from Accumulated other       comprehensive loss into Interest expense		(836	)		(2,607	)