Income Taxes (Tables)

12 Months Ended

Sep. 30, 2017

Income Tax Disclosure [Abstract]

Summary Of Income (Loss) Before Income Taxes

Our income (loss) before income taxes consisted of the following:

	Year ended September 30,
	2017			2016			2015
	(in thousands)
Domestic	$	(140,150	)	$	(156,166	)	$	(110,867	)
Foreign	138,744			88,974			137,392
Total income (loss) before income taxes	$	(1,406	)	$	(67,192	)	$	26,525

Schedule Of Provision For (Benefit From) Income Taxes

Our (benefit) provision for income taxes consisted of the following:

	Year ended September 30,
	2017			2016			2015
	(in thousands)
Current:
Federal	$	2,423		$	2,417		$	3,907
State	340			571			599
Foreign	17,881			28,467			23,823
	20,644			31,455			28,329
Deferred:
Federal	4,911			965			(20,809		)
State	877			515			(566		)
Foreign	(34,077		)	(45,662		)	(27,986		)
	(28,289		)	(44,182		)	(49,361		)
Total provision (benefit) for income taxes	$	(7,645	)	$	(12,727	)	$	(21,032	)

Summary Of Federal Income Tax Rate And Effective Income Tax Rate

Taxes computed at the statutory federal income tax rates are reconciled to the provision (benefit) for income taxes as follows (in thousands):

	Year ended September 30,
	2017					2016					2015
Statutory federal income tax rate	$	(492	)	(35	)%	$	(23,517	)	(35	)%	$	9,284		35	%
Change in valuation allowance	17,334			1,233	%	37,996			57	%	16,718			63	%
State income taxes, net of federal tax benefit	627			45	%	(82		)	—	%	1,788			7	%
Federal research and development credits	(2,182		)	(155	)%	(5,981		)	(9	)%	(2,097		)	(8	)%
Resolution of uncertain tax positions	(3,840		)	(273	)%	—			—	%	(2,991		)	(11	)%
Foreign rate differences	(27,932		)	(1,987	)%	(27,513		)	(41	)%	(56,375		)	(213	)%
Foreign tax on U.S. provision	2,737			195	%	1,987			3	%	3,764			14	%
U.S. permanent items	6,030			429	%	2,886			4	%	9,062			34	%
Other, net	73			4	%	1,497			2	%	(185		)	—	%
Benefit for income taxes	$	(7,645	)	(544	)%	$	(12,727	)	(19	)%	$	(21,032	)	(79	)%

Schedule Of Deferred Tax Assets And Liabilities

The significant temporary differences that created deferred tax assets and liabilities are shown below: 

	September 30,
	2017			2016
	(in thousands)
Deferred tax assets:
Net operating loss carryforwards	$	143,793		$	100,033
Foreign tax credits	21,099			18,041
Capitalized research and development expense	13,044			22,504
Pension benefits	12,107			14,348
Deferred revenue	59,022			65,145
Stock-based compensation	25,360			19,846
Other reserves not currently deductible	16,905			25,993
Amortization of intangible assets	78,351			54,069
Other tax credits	42,652			41,381
Depreciation	3,095			3,002
Capital loss carryforward	33,535			8,019
Deferred interest	11,666			7,622
Other	15,849			14,778
Gross deferred tax assets	476,478			394,781
Valuation allowance	(279,683		)	(235,503		)
Total deferred tax assets	196,795			159,278
Deferred tax liabilities:
Acquired intangible assets not deductible	(70,570		)	(78,663		)
Pension prepayments	(2,093		)	(542		)
Deferred revenue	(6,214		)	(2,039		)
U.S taxes on unremitted foreign earnings	(11,440		)	(67		)
Other	(1,192		)	(2,025		)
Total deferred tax liabilities	(91,509		)	(83,336		)
Net deferred tax assets	$	105,286		$	75,942

Summary Of Valuation Allowance

The changes to the valuation allowance were primarily due to the following:

	Year ended September 30,
	2017			2016			2015
	(in millions)
Valuation allowance beginning of year	$	235.5		$	198.2		$	177.5
Net release of valuation allowance (1)	(9.1		)	(3.1		)	(18.7		)
Net increase/decrease in deferred tax assets with a full valuation allowance	53.3			39.8			39.4
Establish valuation allowance in foreign jurisdictions	—			0.6			—
Valuation allowance end of year	$	279.7		$	235.5		$	198.2

(1) In 2017 and 2016, this is attributable to the release in foreign jurisdictions. In 2015, this is attributable to a reduction in deferred tax assets associated with our U.S. pension plan

Schedule Of Unrecognized Tax Benefit

	Year ended September 30,
Unrecognized tax benefits	2017			2016		2015
	(in millions)
Unrecognized tax benefit beginning of year	$	15.5		$	14.1	$	15.0
Tax positions related to current year:
Additions	0.9			1.0		1.3
Tax positions related to prior years:
Additions	1.0			0.4		0.8
Reductions	(1.6		)	—		(3		)
Settlements	(1.0		)	—		—
Statute expirations	—			—		—
Unrecognized tax benefit end of year	$	14.8		$	15.5	$	14.1

Summary Of Income Tax Examinations Years

As of September 30, 2017, we remained subject to examination in the following major tax jurisdictions for the tax years indicated:

Major Tax Jurisdiction	Open Years
United States	2014 through 2017
Germany	2011 through 2017
France	2014 through 2017
Japan	2012 through 2017
Ireland	2013 through 2017