Stockholders’ Equity (Narrative 2) (Details)	9 Months Ended
	Oct. 01, 2017 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchase rights expiration per month of shares	0.0278
Expiration period of repurchase program	36 months
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining number of shares authorized to be repurchased	44,000