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Organization and Summary of Significant Accounting Policies (Details) - ASU 2016-09 - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2017 | Dec. 31, 2016
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Change in accounting guidance, impact on net income | $ 0.8 | $ 2.6 |
Retained Earnings |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |
Cumulative effect of new accounting principle |  |  | $ 1.6

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