Income Taxes (Tables)

12 Months Ended

Sep. 30, 2018

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,
	2018			2017			2016
	(in thousands)
Domestic	$	(114,591	)	$	(140,150	)	$	(156,166	)
Foreign	143,247			138,744			88,974
Total income (loss) before income taxes	$	28,656		$	(1,406	)	$	(67,192	)

Schedule Of Provision For (Benefit From) Income Taxes

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

	Year ended September 30,
	2018			2017			2016
	(in thousands)
Current:
Federal	$	3,009		$	2,423		$	2,417
State	2,003			340			571
Foreign	28,213			17,881			28,467
	33,225			20,644			31,455
Deferred:
Federal	(12,594		)	4,911			965
State	(445		)	877			515
Foreign	(43,517		)	(34,077		)	(45,662		)
	(56,556		)	(28,289		)	(44,182		)
Total provision (benefit) for income taxes	$	(23,331	)	$	(7,645	)	$	(12,727	)

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,
	2018					2017					2016
Statutory federal income tax rate	$	7,021		25	%	$	(492	)	(35	)%	$	(23,517	)	(35	)%
Change in valuation allowance	(181,047		)	(632	)%	17,334			1,233	%	37,996			57	%
Transition impact of U.S. Tax Act	126,122			440	%	—			—		—			—
Federal rate change	69,648			243	%	—			—	%	—			—	%
State income taxes, net of federal tax benefit	2,401			8	%	627			45	%	(82		)	—	%
Federal research and development credits	(3,058		)	(11	)%	(2,182		)	(155	)%	(5,981		)	(9	)%
Resolution of uncertain tax positions	(4,646		)	(16	)%	(3,840		)	(273	)%	—			—	%
Foreign rate differences	(38,743		)	(135	)%	(27,932		)	(1,987	)%	(27,513		)	(41	)%
Foreign tax on U.S. provision	2,736			10	%	2,737			195	%	1,987			3	%
Excess tax benefits from restricted stock	(11,641		)	(41	)%	—			—		—			—
Audits and settlements	2,352			8	%	—			—		—			—
U.S. permanent items	5,408			19	%	6,030			429	%	2,886			4	%
Other, net	116			1	%	73			4	%	1,497			2	%
Benefit for income taxes	$	(23,331	)	(81	)%	$	(7,645	)	(544	)%	$	(12,727	)	(19	)%

Schedule Of Deferred Tax Assets And Liabilities

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

	September 30,
	2018			2017
	(in thousands)
Deferred tax assets:
Net operating loss carryforwards	$	31,329		$	143,793
Foreign tax credits	2,201			21,099
Capitalized research and development expense	20,999			13,044
Pension benefits	12,296			12,107
Prepaid expenses	30,614			9,250
Deferred revenue	33,886			59,022
Stock-based compensation	11,622			25,360
Other reserves not currently deductible	13,588			16,905
Amortization of intangible assets	96,841			78,351
Other tax credits	55,760			42,652
Depreciation	4,364			3,095
Capital loss carryforward	33,024			33,535
Deferred interest	13,057			11,666
Other	1,152			6,599
Gross deferred tax assets	360,733			476,478
Valuation allowance	(141,950		)	(279,683		)
Total deferred tax assets	218,783			196,795
Deferred tax liabilities:
Acquired intangible assets not deductible	(41,139		)	(70,570		)
Pension prepayments	(2,362		)	(2,093		)
Deferred revenue	(6,978		)	(6,214		)
U.S taxes on unremitted foreign earnings	—			(11,440		)
Deferred income	(6,641		)	—
Other	(1,686		)	(1,192		)
Total deferred tax liabilities	(58,806		)	(91,509		)
Net deferred tax assets	$	159,977		$	105,286

Summary Of Valuation Allowance

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

	Year ended September 30,
	2018			2017			2016
	(in millions)
Valuation allowance beginning of year	$	279.7		$	235.5		$	198.2
Net release of valuation allowance (1)	(2.8		)	(9.1		)	(3.1		)
Net increase (decrease) in deferred tax assets with a full valuation allowance (2)	(134.9		)	53.3			39.8
Establish valuation allowance in foreign jurisdictions	—			—			0.6
Valuation allowance end of year	$	142.0		$	279.7		$	235.5

(1) In 2018, 2017 and 2016, this is attributable to the release in foreign jurisdictions.

(2) This is primarily attributable to U.S. tax reform: the utilization of tax attributes used to offset the transition tax, the revaluation of the U.S. net deferred tax assets and liabilities, the ability to realize net operating losses from the reversal of existing deferred tax assets which can now be carried forward indefinitely and can therefore be netted against deferred tax liabilities for indefinite lived intangible.

Schedule Of Unrecognized Tax Benefit

	Year ended September 30,
Unrecognized tax benefits	2018			2017			2016
	(in millions)
Unrecognized tax benefit beginning of year	$	14.8		$	15.5		$	14.1
Tax positions related to current year:
Additions	1.5			0.9			1.0
Tax positions related to prior years:
Additions	—			1.0			0.4
Reductions	(4.7		)	(1.6		)	—
Settlements	—			(1		)	—
Statute expirations	(1.8		)	—			—
Unrecognized tax benefit end of year	$	9.8		$	14.8		$	15.5

Summary Of Income Tax Examinations Years

As of September 30, 2018, we remained subject to examination in the following major tax jurisdictions for the tax years indicated:

Major Tax Jurisdiction	Open Years
United States	2015 through 2018
Germany	2011 through 2018
France	2015 through 2018
Japan	2013 through 2018
Ireland	2014 through 2018