Summary of Significant Accounting Policies - Recently Adopted Accounting Changes and Recently Issued Accounting Standards (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 02, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 28,627	$ 24,453
Operating lease obligations	29,565	25,943
Accrued liabilities	67,697	47,973		$ 48,469
Other long-term liabilities	$ 9,701	$ 14,041		$ 15,035
ASC 842 | Adjustments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets			$ 24,453
Operating lease obligations			25,943
Accrued liabilities			(496)
Other long-term liabilities			$ (994)