Restructuring - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended
Feb. 13, 2018	Mar. 31, 2018
Restructuring And Related Activities [Abstract]
Restructuring initiated date	Feb. 13, 2018
Percentage of employee affected under reduction in force	9.00%
Restructuring charge		$ 3,927

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration