Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Taxes

Schedule of income (loss) from continuing operations before income taxes

	Year ended December 31,
	2018		2017		2016
	(in thousands)
Domestic	$	(286,561)	$	(101,573)	$	(123,089)
Foreign		(147,273)		12,583		3,885
Total	$	(433,834)	$	(88,990)	$	(119,204)

Schedule of components of the expense (benefit) for income taxes

	Year ended December 31,
	2018		2017		2016
	(in thousands)
Current:
Federal	$	(1,682)	$	—	$	—
Foreign		2,518		(2,246)		1,937
State and local		38		15		(111)
Total current expense (benefit) for income taxes		874		(2,231)		1,826
Deferred:
Federal		205		(35,912)		1,459
Foreign		(27,932)		1,291		(589)
State and local		107		(742)		127
Total deferred expense (benefit) for income taxes		(27,620)		(35,363)		997
Total expense (benefit) for income taxes	$	(26,746)	$	(37,594)	$	2,823

Schedule of reconciliation of the income tax expense computed using the Federal statutory rate to actual income tax provision

	Year ended December 31,
	2018		2017		2016
	(in thousands)
Income tax expense (benefit) at U.S. statutory rates	$	(91,105)	$	(31,147)	$	(41,722)
State taxes, net of U.S. federal impact		(2,848)		(2,523)		(1,963)
Effect of international operations		11,847		10,158		8,798
Research and development tax credit		(2,230)		620		(801)
Net change in valuation allowance		7,747		1,883		50,544
Change in accrual for unrecognized tax benefits		2,868		(4,772)		(1,700)
Subsidiary liquidation		—		—		(12,435)
Share-based compensation		1,848		99		2,133
Effect of 2017 Tax Act		(1,690)		(11,344)		—
Asset impairment		46,872		—		—
Other		(55)		(568)		(31)
Total expense (benefit) for income taxes	$	(26,746)	$	(37,594)	$	2,823

Schedule of deferred tax assets and liabilities

	December 31,
	2018		2017
	(in thousands)
Deferred tax assets:
Inventory valuation	$	8,943	$	8,007
Net operating losses		67,787		73,458
Credit carry forwards		52,592		34,966
Warranty and installation accruals		1,695		1,690
Share-based compensation		6,981		7,385
Other		2,182		1,832
Total deferred tax assets		140,180		127,338
Valuation allowance		(114,955)		(100,456)
Net deferred tax assets		25,225		26,882
Deferred tax liabilities:
Purchased intangible assets		15,401		45,807
Convertible Senior Notes		11,265		13,534
Depreciation		2,380		1,339
Total deferred tax liabilities		29,046		60,680
Net deferred taxes	$	(3,821)	$	(33,798)

Schedule of reconciliation of beginning and ending amount of uncertain tax positions

	December 31,
	2018		2017		2016
	(in thousands)
Balance at beginning of year	$	8,269	$	7,452	$	9,152
Additions for tax positions related to current year		2,154		511		1,038
Additions for tax positions related to prior years		1,721		3		233
Reductions for tax positions related to prior years		(934)		(4,877)		(2,826)
Reductions due to the lapse of the statute of limitations		(26)		(122)		(39)
Settlements		(47)		(287)		(106)
Additions for business combination		—		5,589		—
Balance at end of year	$	11,137	$	8,269	$	7,452