Balance sheet components (Tables)

12 Months Ended

Sep. 30, 2019

Balance Sheet Related Disclosures [Abstract]

Schedule of property, plant and equipment

Property and equipment, at cost, consists of the following (in thousands):

	As of September 30,
	2019		2018
Land	$	1,738	$	1,738
Building and improvements	12,044		12,044
Office furniture and equipment	246,671		203,512
Leasehold improvements	69,183		55,918
	329,636		273,212
Less: Accumulated depreciation and amortization	(230,047)		(195,668)
Total property and equipment, net	$	99,589	$	77,544

Components of capitalized software

Capitalized software consists of the following (in thousands):

	As of September 30,
	2019		2018
Capitalized software	$	103,643	$	94,803
Less: Accumulated amortization	(71,274)		(72,374)
Total capitalized software, net	$	32,369	$	22,429

Deferred contract costs

Deferred contract costs consist of the following (in thousands):

	As of September 30,
	2019		2018
Deferred contract costs	$	43,140	$	29,941
Less: Accumulated amortization	(24,219)		(15,561)
Total deferred contract costs, net	$	18,921	$	14,380