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The Company and Summary of Significant Accounting Policies and Estimates - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Cash flows from operating activities | $ (883) | $ 17,017
Cash flow from financing activities | 9,738 | $ 33,008
Cumulative-effect adjustment to retained earnings | 57,205 |
Retained Earnings |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Cumulative-effect adjustment to retained earnings | 53,912 |
Accounting Standards Update 2016-09, Excess Tax Benefit Component Increase to Operating Cash FLows |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Cash flows from operating activities | 3,300 |
Gross excess tax benefits | 75,200 |
Tax benefit valuation allowance | 18,000 |
Accounting Standards Update 2016-09, Excess Tax Benefit Component Increase to Operating Cash FLows | Retained Earnings |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Cumulative-effect adjustment to retained earnings | 57,200 |
Accounting Standards Update 2016-09, Excess Tax Benefit Component Decrease to Financing Cash Flows |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Cash flow from financing activities | 3,300 |
Accounting Standards Update 2016-09, Forfeiture Rate Component | Retained Earnings |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
New Accounting Pronouncement, Cumulative Effect of Change on Retained Earning | $ 3,300 |

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