Organization and Summary of Significant Accounting Policies - Impact of Adopted Standard (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Jun. 30, 2019	Dec. 31, 2018
Accounting Principle [Line Items]
Current lease liability	$ 10,300	$ 10,286	$ 0
Operating lease right-of-use assets	66,008	61,482	0
Accrued liabilities	53,114	54,570	43,047
Other long-term liabilities	5,712	9,603	9,562
Long-term operating lease liabilities	59,791	$ 55,237	$ 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
Other long-term liabilities	9,562
Long-term operating lease liabilities	0
Adjustment | Accounting Standards Update 2016-02
Accounting Principle [Line Items]
Operating lease right-of-use assets	66,008
Accrued liabilities	10,067
Other long-term liabilities	(3,850)
Long-term operating lease liabilities	$ 59,791