Income Per Share - Additional Information (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from diluted weighted average shares outstanding (in shares)	900	900	800	500
Anti-dilutive shares excluded from diluted weighted average shares outstanding due to performance conditions not being met (in shares)	300	200	200	200
Weighted Average Number Diluted Shares Outstanding Adjustment	311	0	308	412
Convertible Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive shares excluded from diluted weighted average shares outstanding (in shares)		6,800	6,900	6,900