| Income Tax Disclosure [Abstract] | Period [Axis] |
|---|
2016-01-01 - 2016-12-31 |
|---|
Income Tax Disclosure [Abstract] | |
Components Of Benefit (Provision) For Income Taxes | The components of the provision for income taxes are as follows (in thousands): | | | | | | | | | | | | | | Year Ended December 31, | | 2014 | | 2015 | | 2016 | Current: | | | | | | Federal | $ | (9,459 | ) | | $ | (9,873 | ) | | $ | (16,370 | ) | State | (1,539 | ) | | (3,296 | ) | | (2,089 | ) | | (10,998 | ) | | (13,169 | ) | | (18,459 | ) | Deferred: | | | | | | Federal | (828 | ) | | (2,902 | ) | | 5,740 |
| State | (117 | ) | | 1,034 |
| | 743 |
| | (945 | ) | | (1,868 | ) | | 6,483 |
| Total provision for income taxes | $ | (11,943 | ) | | $ | (15,037 | ) | | $ | (11,976 | ) |
|
Deferred Tax Assets (Liabilities) | Deferred tax assets (liabilities) consist of the following (in thousands): | | | | | | | | December 31,
2015 | | December 31,
2016 | Deferred tax assets | | | | Net operating loss carryforwards | 1,725 |
| | 1,349 |
| Stock-based compensation | 14,970 |
| | 20,122 |
| R&D and other credits | 4,270 |
| | 5,541 |
| Reserves-noncurrent | 7,018 |
| | 8,080 |
| Gross deferred tax assets | 27,983 |
| | 35,092 |
| Deferred tax liabilities | | | | Property and equipment | (4,123 | ) | | (4,779 | ) | Intangible assets | (4,122 | ) | | (285 | ) | Goodwill | (9,901 | ) | | (13,719 | ) | Gross deferred tax liabilities | (18,146 | ) | | (18,783 | ) | | | | | Net deferred tax assets and liabilities | 9,837 |
| | 16,309 |
|
|
Reconciliation Of Statutory Federal Income Tax Rate To Effective Tax Rate | Reconciliation of the statutory federal income tax rate to the Company’s effective tax rate for the years ended December 31, 2014, 2015 and 2016: | | | | | | | | | | | Year Ended December 31, | | 2014 | | 2015 | | 2016 | Tax provision at U.S. statutory rate | 35 | % | | 35 | % | | 35 | % | State income taxes, net of federal benefit | 5 |
| | 5 |
| | 3 |
| Permanent items - other | 1 |
| | 1 |
| | 1 |
| R&D credits | — |
| | (1 | ) | | (2 | ) | Other | (1 | ) | | — |
| | — |
| Provision (benefit) for tax | 40 | % | | 40 | % | | 37 | % |
|
Reconciliation Of Gross Unrecognized Tax Benefits | A reconciliation of the beginning and ending balances of the total amounts of gross unrecognized tax benefits is as follows (in thousands): | | | | | | | | | | | | | | Year Ended December 31, | | 2014 | | 2015 | | 2016 | Balance, beginning of year | 3,716 |
| | 4,109 |
| | 4,429 |
| Increase in tax positions for prior years | — |
| | 134 |
| | 201 |
| Decrease in tax positions for prior years | (90 | ) | | — |
| | — |
| Increase in tax positions for current year | 483 |
| | 319 |
| | 236 |
| Other decreases | — |
| | (133 | ) | | (136 | ) | Balance, end of year | $ | 4,109 |
| | $ | 4,429 |
| | $ | 4,730 |
|
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