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Organization and Summary of Significant Accounting Policies (Stock-Based Compensation) (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016
New Accounting Pronouncement, Early Adoption [Line Items] |  |  |
Increase in cash provided by operating activities | $ 68,858,000 | $ 156,810,000 |
Increase in cash used in financing activities | $ 71,868,000 | 1,877,000 |
Accounting Standards Update 2016-09, Forfeiture Rate Component [Member] | Accumulated Deficit [Member] |  |  |
New Accounting Pronouncement, Early Adoption [Line Items] |  |  |
Cumulative adjustment |  |  | $ 300,000
New Accounting Pronouncement, Early Adoption, Effect [Member] | Accounting Standards Update 2016-09, Excess Tax Benefit Component [Member] [Member] |  |  |
New Accounting Pronouncement, Early Adoption [Line Items] |  |  |
Increase in federal and state net operating losses |  |  | 56,900,000
Increase in deferred tax assets |  |  | 21,200,000
Increase in valuation allowance |  |  | 21,200,000
Net impact on provision for income taxes |  |  | $ 0
Increase in cash provided by operating activities |  | 1,900,000 |
Increase in cash used in financing activities |  | $ 1,900,000 |

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