Stock-Based Compensation Stock Based Compensation, Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Dec. 14, 2014	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			$ 19.35
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		23,814	190,015	225,205
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		376,033		1,819,444	2,466,606
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			1,300,000
Full Value Awards, Maximum Number of Shares Authorized Under Plan			600,000
Proceeds from Stock Options Exercised		$ 7,265	$ 7,300	$ 7,423	$ 2,865
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value			$ 800	$ 1,500
Share Price				$ 18.87
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized				$ 3,800
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition		1 year 251 days
capitalized share based compensation cost				$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		420,642		453,745
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period		117,269		72,167
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period		905,500		121,250
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			109,354
Market Based Performance Stock Units [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			27,338
Restricted Stock [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			53,323
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			3 years	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			$ 18.31	$ 19.44
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period				132,455
Employment agreement [Member] | 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			18.78
Employment agreement [Member] | Market Based Performance Stock Units [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			$ 24.81