Stock-Based Compensation Stock Based Compensation, Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Dec. 14, 2014	Dec. 31, 2016	Dec. 25, 2016	Dec. 31, 2015	Dec. 27, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value				$ 18.31
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		0		23,814
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		231,625		376,033		1,819,444
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized						3,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant			1,800,000
Full Value Awards, Maximum Number of Shares Authorized Under Plan			600,000
Proceeds from Stock Options Exercised			$ 1,641	$ 7,265		$ 7,423
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value			$ 700		$ 800
Share Price		$ 26.85
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized		$ 3,700
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition			1 year 7 months 9 days
capitalized share based compensation cost						$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			86,908		420,642
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period			24,750		117,269
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period			32,750		905,500
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 23.14		$ 18.78
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		127,139		109,354
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			3 years
Maximum [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date						10 years
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Minimum [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period						0 years
Employment agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 0.00				$ 19.44
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period						132,455