Benefit Plans - Additional Information (Detail) - Employee Benefit Plans [Member]	3 Months Ended
Mar. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Maximum percentage of current compensation of employee to contribute in plan	15.00%
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer matches employee contribution percentage	4.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration