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Income Taxes (Tables) | 12 Months Ended
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Jun. 30, 2015
Schedule of Income Tax Expense | Income tax expense consists of the following:
|  | Year ended June 30, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
Current: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 53.7 |  |  | $ | 97.4 |  |  | $ | 80.3 |
State |  |  | 4.7 |  |  |  | 3.5 |  |  |  | 6.0 |
Total Current |  |  | 58.4 |  |  |  | 100.9 |  |  |  | 86.3 |
Deferred: |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | (2.1 | ) |  |  | (0.7 | ) |  |  | 0.7 |
State |  |  | 8.7 |  |  |  | 0.8 |  |  |  | (0.4 | )
Foreign |  |  | (2.3 | ) |  |  | (2.9 | ) |  |  | (2.1 | )
Change in valuation allowance |  |  | (8.0 | ) |  |  | 3.5 |  |  |  | 1.6 |
Total Deferred |  |  | (3.7 | ) |  |  | 0.7 |  |  |  | (0.2 | )
Total income tax expense |  | $ | 54.7 |  |  | $ | 101.6 |  |  | $ | 86.1 |
Schedule of Income (Loss) Before Income Taxes | Income (loss) before income taxes consists of the following:
|  | Year ended June 30, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
United States |  | $ | 147.0 |  |  | $ | 292.0 |  |  | $ | 243.6 |
Foreign |  |  | (12.1 | ) |  |  | (14.2 | ) |  |  | (10.3 | )
Total |  | $ | 134.9 |  |  | $ | 277.8 |  |  | $ | 233.3 |
Schedule of Differences Between Statutory Federal Income Tax Rate and Income Taxes Reported in Consolidated Statements of Operations | The differences between income taxes at the statutory federal income tax rate and income taxes reported in the consolidated statements of operations were as follows:
|  | Year ended June 30, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
Federal income tax expense at the statutory rate |  |  | 35.0 | % |  |  | 35.0 | % |  |  | 35.0 | %
State income taxes, net of federal benefit |  |  | 1.7 |  |  |  | 1.6 |  |  |  | 1.7 |
Research and development credits, net of the federal tax on state credits |  |  | (2.5 | ) |  |  | (0.2 | ) |  |  | (1.0 | )
Uncertain tax positions, net of federal benefit on state positions |  |  | 1.2 |  |  |  | (0.1 | ) |  |  | 0.2 |
Incentive stock option and employee stock purchase plan expense |  |  | 0.2 |  |  |  | (0.3 | ) |  |  | (0.5 | )
Adjustment to deferred tax liability attributable to acquired intangible assets |  |  | 1.6 |  |  |  | — |  |  |  | — |
Foreign rate differential |  |  | 1.6 |  |  |  | 0.8 |  |  |  | 0.6 |
Change in valuation allowance |  |  | 2.6 |  |  |  | 1.2 |  |  |  | 0.7 |
Basis difference, disposition of foreign subsidiary |  |  | — |  |  |  | (1.9 | ) |  |  | — |
California basis step-up election, net of related valuation allowance impact |  |  | (1.2 | ) |  |  | — |  |  |  | — |
Other, net |  |  | 0.4 |  |  |  | 0.5 |  |  |  | 0.2 |
Effective income tax rate |  |  | 40.6 | % |  |  | 36.6 | % |  |  | 36.9 | %
Schedule of Components of Deferred Tax Assets and Liabilities | The significant components of the Company’s deferred tax assets and liabilities were comprised of the following at June 30, 2015 and 2014:
|  | Year ended June 30, |
|  | 2015 |  |  | 2014 |
Deferred tax assets: |  |  |  |  |  |  |  |
Net operating loss carryforwards |  | $ | 61.1 |  |  | $ | 77.0 |
Property, plant and equipment |  |  | 2.9 |  |  |  | 2.9 |
Accrued vacation |  |  | 1.7 |  |  |  | 1.6 |
Allowance for doubtful accounts |  |  | 2.7 |  |  |  | 3.3 |
Stock compensation expense |  |  | 36.8 |  |  |  | 26.0 |
Research and development credits |  |  | 8.9 |  |  |  | 11.2 |
Uncertain state tax positions |  |  | 1.1 |  |  |  | 0.6 |
Other, net |  |  | 0.9 |  |  |  | 0.3 |
Total gross deferred tax assets |  |  | 116.1 |  |  |  | 122.9 |
Less valuation allowance |  |  | (33.4 | ) |  |  | (41.4 | )
Total deferred tax assets |  |  | 82.7 |  |  |  | 81.5 |
Deferred tax liabilities: |  |  |  |  |  |  |  |
Intangible assets |  |  | 69.4 |  |  |  | 71.8 |
Total deferred tax liabilities |  |  | 69.4 |  |  |  | 71.8 |
Net deferred tax assets |  |  | 13.3 |  |  |  | 9.7 |
Current net deferred tax asset |  |  | 13.5 |  |  |  | 6.5 |
Long term net deferred tax asset |  |  | (0.2 | ) |  |  | 3.2 |
Net deferred tax asset |  | $ | 13.3 |  |  | $ | 9.7 |
Summary of Net Operating Loss and Research Credit Carryforwards | At June 30, 2015, the Company had the following net operating loss and research credit carryforwards, with their respective expiration periods. Certain carryforwards are subject to the limitations of Section 382 and 383 of the Internal Revenue Code as indicated
Carryforwards |  | Amount |  |  | Subject to sections 382, 383 |  | Expires beginning in year |  | Through
Federal net operating loss |  | $ | 138.4 |  |  | Yes |  | 2027 |  | 2033
Utah net operating loss |  |  | 229.9 |  |  | No |  | 2016 |  | 2024
Oklahoma net operating loss |  |  | 14.1 |  |  | Yes |  | 2023 |  | 2033
Foreign net operating losses (various jurisdictions) |  |  | 39.3 |  |  | No |  | Various |  | Various
Federal research credit |  |  | 3.2 |  |  | Yes |  | 2025 |  | 2032
Utah research credit |  |  | 8.6 |  |  | No |  | 2021 |  | 2029
Schedule of Reconciliation of Beginning and Ending Unrecognized Tax Benefits | A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
|  | Year ended June 30, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
Unrecognized tax benefits at the beginning of year |  | $ | 24.2 |  |  | $ | 10.9 |  |  | $ | 10.2 |
Gross increases - current year tax positions |  |  | 1.1 |  |  |  | 1.8 |  |  |  | 0.7 |
Gross increases - prior year tax positions |  |  | 1.0 |  |  |  | 0.3 |  |  |  | — |
Gross increases - acquisitions |  |  | — |  |  |  | 14.2 |  |  |  | — |
Gross decreases - prior year tax positions |  |  | — |  |  |  | (3.0 | ) |  |  | — |
Unrecognized tax benefits at end of year |  | $ | 26.3 |  |  | $ | 24.2 |  |  | $ | 10.9 |
Interest and penalties in year-end balance |  | $ | 1.0 |  |  | $ | 0.6 |  |  | $ | 0.3 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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