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The Company and Summary of Significant Accounting Policies and Estimates - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	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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