Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Taxes

Schedule of benefit (expense) for income taxes

	For the year ended December 31,
(in millions)	2016		2015		2014
Current:
Federal	$	—	$	—	$	—
State		(0.1)		0.1		0.1
Foreign		(0.2)		(0.1)		(0.3)
Total current		(0.3)		—		(0.2)
Deferred:
Federal		(18.5)		(10.8)		(6.3)
State		0.5		1.6		(0.4)
Total deferred		(18.0)		(9.2)		(6.7)
Income tax expense	$	(18.3)	$	(9.2)	$	(6.9)

Schedule of difference between the expense for income taxes and the amount computed by applying the U.S. federal income tax rate to income or loss before income taxes

	For the year ended December 31,
(in millions)	2016		2015		2014
Federal income tax expense	$	(17.0)	$	(11.4)	$	(8.9)
State income tax (expense) benefit, net of federal impact		(1.3)		0.1		(0.3)
State tax benefit due to change in state tax rate		0.6		1.5		—
Section 162(m) limitation		(0.3)		(0.7)		(0.5)
Other non-deductible items		(1.5)		(0.7)		(0.5)
Change in reserves related to settlement with tax authorities		—		—		2.4
Investment loss		—		2.6		—
Research and experimentation tax credit		1.3		1.9		1.4
Change in valuation allowance		—		(2.6)		0.5
Other		(0.1)		0.1		(1.0)
Income tax expense	$	(18.3)	$	(9.2)	$	(6.9)

Schedule of deferred tax assets and liabilities

	As of December 31,
(in millions)	2016		2015
Long-term deferred tax assets (liabilities), net
Net operating and capital loss carryforwards	$	93.0	$	106.7
Research and development and other state tax credits		33.5		32.2
Foreign tax credits		6.2		6.1
Compensation accruals		10.1		3.7
Stock-based compensation		10.6		11.0
Deferred revenue		109.6		128.0
Fixed assets		(356.9)		(363.1)
Intangible assets		(27.1)		(6.5)
Other		1.8		0.3
Valuation allowance		(4.8)		(4.8)
Total long-term deferred tax liabilities, net	$	(124.0)	$	(86.4)

Schedule of reconciliation of uncertain tax positions

(in millions)	2016		2015		2014
Balance as of January 1	$	10.4	$	9.6	$	11.5
Additions:
Current year tax positions		0.6		0.5		0.3
Prior year tax positions		—		0.3		0.2
Decreases:
Settlement with taxing authority		—		—		(2.4)
Balance as of December 31	$	11.0	$	10.4	$	9.6