Share-based Compensation (Restricted Stock and PSU (Details) $ / shares in Units, $ in Thousands				6 Months Ended		12 Months Ended	18 Months Ended
	Jan. 08, 2016 shares	Nov. 19, 2015 USD ($) $ / shares	Jan. 08, 2015 USD ($) $ / shares	Jun. 28, 2016 USD ($) $ / shares shares	Jun. 30, 2015 USD ($)	Dec. 29, 2015 item $ / shares shares	Jun. 28, 2016 USD ($) item $ / shares shares
Share-based compensation
Number of executives granted performance stock units | item							2
Restricted Stock Units
Restricted Stock Units, Shares
Outstanding at the beginning of the period (in shares) | shares				984,586
Granted (in shares) | shares				271,824
Forfeited (in shares) | shares				(15,445)
Vested (in shares) | shares				(324,945)
Outstanding at the end of period (in shares) | shares				916,020		984,586	916,020
Restricted Stock Units, Weighted-Average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share) | $ / shares				$ 32.86
Granted (in dollars per share) | $ / shares				41.61
Forfeited (in dollars per share) | $ / shares				31.63
Vested (in dollars per share) | $ / shares				33.17
Outstanding at the end of the period (in dollars per share) | $ / shares				$ 35.36		$ 32.86	$ 35.36
Weighted-Average Remaining Contractual Term (years)
Weighted-Average Remaining Contractual Term				1 year 3 months 18 days
Aggregate Intrinsic Value
Outstanding at the end of the period (in dollars) | $				$ 41,060			$ 41,060
Intrinsic value of awards vested (in dollars) | $				13,000	$ 17,400
Unrecognized compensation cost
Unrecognized compensation cost of unvested stock awards (in dollars) | $				$ 19,400			19,400
Expected weighted-average period of recognition of unrecognized compensation cost of unvested awards				1 year 3 months 18 days
Share-based Compensation, other disclosures
Excess tax benefit realized from tax deductions that vested | $				$ 900	$ 2,000
Restricted Stock Units | Minimum
Share-based compensation
Vesting period				1 year
Restricted Stock Units | Maximum
Share-based compensation
Vesting period				5 years
PSUs
Share-based compensation
Number of executives granted performance stock units | item						2
Vesting period						1 year
Restricted Stock Units, Shares
Vested (in shares) | shares	(144,000)
Restricted Stock Units, Weighted-Average Grant Date Fair Value
Granted (in dollars per share) | $ / shares		$ 34.11	$ 34.77
Unrecognized compensation cost
Unrecognized compensation cost of unvested stock awards (in dollars) | $				$ 2,100			$ 2,100
Expected weighted-average period of recognition of unrecognized compensation cost of unvested awards				6 months
Share-based Compensation, other disclosures
Grant date fair value | $		$ 3,900	$ 4,000