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Organization and Summary of Significant Accounting Policies (Stock-Based Compensation) (Details) - USD ($) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016
New Accounting Pronouncement, Early Adoption [Line Items] |  |  |
Increase in cash provided by operating activities | $ 74,393,000 | $ 131,076,000 |
Increase in cash used in financing activities | $ 172,086,000 | (627,000) |
Accounting Standards Update 2016-09 [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 |  | 2,100,000 |
Increase in cash used in financing activities |  | $ 2,100,000 |
Accounting Standards Update 2016-09 [Member] | Accumulated Deficit [Member] |  |  |
New Accounting Pronouncement, Early Adoption [Line Items] |  |  |
Cumulative adjustment |  |  | $ 300,000

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