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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2017
Income Tax Disclosure [Abstract] |
Schedule Of Components Of Income Tax Expense | The components of our income (loss) before benefit for income taxes were as follows (in thousands):
| Year Ended December 31,
| 2015 |  | 2016 |  | 2017
United States | $ | 11,236 |  |  | $ | 3,087 |  |  | $ | (9,242 | )
Foreign | 435 |  |  | 885 |  |  | 972 |
Income (loss) before provision for income taxes | $ | 11,671 |  |  | $ | 3,972 |  |  | $ | (8,270 | )
Schedule Of Income Before Income Tax, Domestic And Foreign | The provision (benefit) for income taxes consisted of the following (in thousands):
| Year Ended December 31,
| 2015 |  | 2016 |  | 2017
Current: |  |  |  |  |  |  |  |
Federal | $ | (584 | ) |  | $ | (948 | ) |  | $ | (275 | )
State | (457 | ) |  | (214 | ) |  | (1,433 | )
Foreign | 97 |  |  | 178 |  |  | 179 |
Total current | (944 | ) |  | (984 | ) |  | (1,529 | )
Deferred: |  |  |  |  |  |  |  |
Federal | 8,037 |  |  | 4,306 |  |  | (28,161 | )
State | 644 |  |  | 361 |  |  | (3,992 | )
Foreign | (30 | ) |  | (15 | ) |  | (14 | )
Total deferred | 8,651 |  |  | 4,652 |  |  | (32,167 | )
Provision (benefit) for income taxes | $ | 7,707 |  |  | $ | 3,668 |  |  | $ | (33,696 | )
Schedule Of Effective Income Tax Rate Reconciliation | The following table provides a reconciliation of the federal statutory income tax rate to our effective tax rate:
| Year Ended December 31,
| 2015 |  | 2016 |  | 2017
Tax provision (benefit) at U.S. statutory rate | 35.0 | % |  | 35.0 | % |  | 35.0 | %
State income taxes, net of federal benefit | 10.5 |  |  | 14.1 |  |  | 31.7 |
Non-qualified stock option shortfalls (windfalls), net | 15.2 |  |  | 23.0 |  |  | 1.9 |
Stock-based compensation | 11.0 |  |  | 18.3 |  |  | (9.7 | )
Lobbying | 2.6 |  |  | 8.9 |  |  | (9.1 | )
Research and development credits | (9.7 | ) |  | (20.4 | ) |  | (1.5 | )
Tax reform - tax rate change | — |  |  | — |  |  | 355.9 |
Foreign income tax and income inclusion | — |  |  | 10.9 |  |  | 2.7 |
Other | 1.4 |  |  | 2.4 |  |  | 0.7 |
Effective tax rate | 66.0 | % |  | 92.2 | % |  | 407.6 | %
Schedule Of Deferred Tax Assets And Liabilities | Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes, together with net operating loss and tax credit carry forwards. Significant components of our deferred tax assets were as follows (in thousands):
| December 31, 2016 |  | December 31, 2017
Deferred tax assets: |  |  |  |  |
Accruals and reserves | $ | 2,242 |  |  | $ | 2,499 |
Stock-based compensation | 2,960 |  |  | 2,443 |
Intangible assets | 1,464 |  |  | 448 |
Net operating losses | 9,337 |  |  | 12,055 |
Tax credits | 4,399 |  |  | 3,569 |
Other | 70 |  |  | 178 |
Total deferred tax assets | 20,472 |  |  | 21,192 |
Deferred tax liabilities: |  |  |
Commissions receivable | (93,538 | ) |  | (64,911 | )
Intangible assets | (2,133 | ) |  | (1,083 | )
Fixed assets | — |  |  | (55 | )
Total deferred tax liabilities | (95,671 | ) |  | (66,049 | )
Net deferred tax liabilities | $ | (75,199 | ) |  | $ | (44,857 | )
Schedule Of Unrecognized Tax Benefits Roll Forward | A reconciliation of the beginning and ending amount of our unrecognized tax benefits is as follows (in thousands):
| Unrecognized Tax Benefits
Balance at December 31, 2014 | $ | 6,756 |
Increases based on tax positions related to the prior year | 344 |
Decreases based on tax positions related to the prior year | (24 | )
Lapse of statute of limitations | (1,301 | )
Additions based on tax positions related to the current year | 409 |
Balance at December 31, 2015 | $ | 6,184 |
Lapse of statute of limitations | (1,236 | )
Additions based on tax positions related to the current year | 305 |
Balance at December 31, 2016 | 5,253 |
Decreases based on tax positions related to the prior year | (862 | )
Lapse of statute of limitations | (1,637 | )
Additions based on tax positions related to the current year | 342 |
Balance at December 31, 2017 | $ | 3,096 |

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