Share-Based Compensation - Employee Stock Purchase Plan (Details) - 2011 Plan - Employee Stock Purchase Plan - Common Stock	6 Months Ended
Jun. 27, 2020 shares
Date Of Purchase
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price per share fair market value percentage	95.00%
Date Of Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	1,500,000

Number of shares authorized for issuance under share-based payment arrangement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant