Organization and Summary of Significant Accounting Policies - Impact of Adopted Standard (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Sep. 30, 2019	Dec. 31, 2018
Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 66,008	$ 59,041	$ 0
Accrued liabilities	53,114	58,017	43,047
Long-term operating lease liabilities	59,791	52,738	0
Other long-term liabilities	5,712	9,798	9,562
Operating lease liabilities, current portion	10,300	$ 10,281	$ 0
Exit costs obligations	100
Current rent credit	100
Pre-Adjustment
Accounting Principle [Line Items]
Operating lease right-of-use assets	0
Accrued liabilities	43,047
Long-term operating lease liabilities	0
Other long-term liabilities	9,562
Adjustment | Accounting Standards Update 2016-02
Accounting Principle [Line Items]
Operating lease right-of-use assets	66,008
Accrued liabilities	10,067
Long-term operating lease liabilities	59,791
Other long-term liabilities	$ (3,850)