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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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