Defined Contribution, Bonus, and Profit Sharing Plans - Narrative (Details)	12 Months Ended
Dec. 31, 2018
Defined Contribution, Bonus, and Profit Sharing [Abstract]
Employer matching contribution, percentage of match	75.00%
Employer matching contribution, percentage of employees' gross pay	6.00%

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration