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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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