Earnings Per Share - Reconciliation of Basic and Diluted Weighted Average Shares Outstanding (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2017 |
Apr. 01, 2016 |
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Net income | $ 6,668 | $ 6,589 |
| Weighted average common shares outstanding - basic (in shares) | 10,909 | 10,628 |
| Add: Dilutive impact of stock options (in shares) | 41 | 61 |
| Diluted weighted average common shares outstanding (in shares) | 11,075 | 10,856 |
| Basic earnings per share (in dollars per share) | $ 0.61 | $ 0.62 |
| Diluted earnings per share (in dollars per share) | $ 0.60 | $ 0.61 |
| Restricted Stock Units (RSUs) | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Add: Dilutive impact of restricted stock units (in shares) | 125 | 167 |