Accrued Liabilities - (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Payables and Accruals [Abstract]
Accrued compensation	$ 31,342		$ 29,616
Accrued income tax and sales tax	163		82
Other	6,115		8,088
Total	$ 37,620	$ 37,457	$ 37,786

Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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