Stock-Based Compensation (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Apr. 03, 2015
Restricted shares
Stock-based compensation
Vesting period	3 years
Changes in option awards outstanding, Shares
Balance at the beginning of the period (in shares)	122
Number of shares awarded	42
Vested or Exercised (in shares)	(25)
Balance at the end of the period (in shares)	139
Changes in option awards, Wtd Avg Ex. Price
Balance at the beginning of the period (in dollars per share)	$ 22.68
Granted (in dollars per share)	$ 35.62
Vested or Exercised (in dollars per share)	$ 24.16
Balance at the end of the period (in dollars per share)	$ 26.33
Option awards
Stock-based compensation
Vesting period	4 years
Option share awards vest annually in increments (as a percent)	25.00%
Changes in option awards outstanding, Shares
Balance at the beginning of the period (in shares)	427
Number of shares awarded	55
Vested or Exercised (in shares)	(2)
Balance at the end of the period (in shares)	480
Changes in option awards, Wtd Avg Ex. Price
Balance at the beginning of the period (in dollars per share)	$ 24.89
Granted (in dollars per share)	$ 37.28
Vested or Exercised (in dollars per share)	$ 20.99
Balance at the end of the period (in dollars per share)	$ 26.32
Aggregate Intrinsic Value
Balance at the beginning of the period	$ 1,734
Granted	510
Vested or Exercised	(38)
Balance at the end of the period	$ 9,710