(9) Performance Shares, Stock Options, Other Forms of Compensation, and Common Share Repurchases (Details) (USD $) | 3 Months Ended | 12 Months Ended |
Mar. 29, 2015 | Mar. 30, 2014 | Dec. 28, 2014 | Dec. 29, 2013 |
Common Share Repurchases [Line Items] | | | | |
Average Cost Per Repurchased Share | $30.67 | | | |
Number Of Shares Repurchased | 118,210 | | | |
Payments for Repurchase of Equity | $3.60 | | | |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] | | | | |
Number of Shares Available for Grant | 254,762 | | | |
Board of Directors' Compensation [Abstract] | | | | |
Board of Director Cash Compensation | 77,000 | 112,000 | | |
Total Board of Directors Compensation | 160,000 | 114,000 | | |
Options Outstanding Rollforward [Abstract] | | | | |
Outstanding options (in shares) | | 291,000 | | 196,000 |
Outstanding Weighted Average Exercise Price | | $28.66 | | $27.67 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | 75,000 | 95,000 | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | | $30.66 | | |
Share-based Compensation Arrangement By Share-based Payment Award Options Outstanding Weighted Average Remaining Contractual Term | | 7 years 4 months 24 days | | 6 years 6 months 2190 days |
Weighted average fair value of options | $7.55 | | $10.42 | |
Expected life (in years) | 3 years 10 months 1119 days | | 4 years 9 months 1478 days | |
Expected stock volatility | 37.40% | | 41.90% | |
Risk-free interest rate | 1.00% | | 1.40% | |
CEO Employment [Member] | | | | |
Board of Directors' Compensation [Abstract] | | | | |
Option Vesting Installment | 12,500 | | | |
Options Outstanding Rollforward [Abstract] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | | 25,000 | | |
CFO Employment [Member] | | | | |
Options Outstanding Rollforward [Abstract] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | 78,000 | | | |
Two Thousand Ten Program [Member] | Performance Stock Units (PSUs) [Member] | | | | |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] | | | | |
Stock Granted During Period, Value, Share-based Compensation, Forfeited | | 49,000 | | |
Two Thousand Eleven Program [Member] | | | | |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] | | | | |
Allocated Share-based Compensation Expense | 0 | -55,000 | | |
Stock Granted During Period, Value, Share-based Compensation, Forfeited | | 401,000 | | |
Two Thousand Twelve Program [Member] | | | | |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] | | | | |
Allocated Share-based Compensation Expense | 0 | -370,000 | | |
Two Thousand Twelve Program [Member] | Performance Shares [Member] | | | | |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] | | | | |
Stock Granted During Period, Value, Share-based Compensation, Forfeited | | 280,000 | | |
Two Thousand Thirteen Program [Member] | | | | |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] | | | | |
Allocated Share-based Compensation Expense | 28,000 | -266,000 | | |
Stock Granted During Period, Value, Share-based Compensation, Forfeited | | 128,000 | | |
Maximum Payout Percentage | 100.00% | | | |
Two Thousand Thirteen Program [Member] | Performance Shares [Member] | | | | |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted | 23,070 | | | |
Estimated Payout Of Shares Granted | 21,408 | | | |
Two Thousand Thirteen Program [Member] | Performance Stock Units (PSUs) [Member] | | | | |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted | 2,230 | | | |
Estimated Payout Of Shares Granted | 2,069 | | | |
Two Thousand Thirteen Program [Member] | Performance Shares and Performance Stock Units [Member] | | | | |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] | | | | |
Assumed Achievement Percentage | 100.00% | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted | 25,300 | | | |
Estimated Payout Of Shares Granted | 22,477 | | | |
Estimated Attainment Percentage | 92.80% | | | |
Performance Programs Total [Member] | | | | |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] | | | | |
Allocated Share-based Compensation Expense | 28,000 | -691,000 | | |
Director Program [Member] | | | | |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] | | | | |
Allocated Share-based Compensation Expense | 0 | 2,000 | | |
Stock Granted During Period, Value, Share-based Compensation, Forfeited | | 55,000 | | |
Director Program [Member] | Restricted Stock Units (RSUs) [Member] | | | | |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] | | | | |
Allocated Share-based Compensation Expense | 15,000 | 2,000 | | |
Director Program [Member] | Stock Option Member | | | | |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] | | | | |
Allocated Share-based Compensation Expense | 68,000 | 0 | | |
Restricted Stock And Restricted Stock Units [Member] | | | | |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] | | | | |
Allocated Share-based Compensation Expense | 15,000 | -73,000 | | |
Stock Granted During Period, Value, Share-based Compensation, Forfeited | | 20,000 | | |
Two Thousand Five Stock Option Plan [Member] | | | | |
Share-based Compensation Arrangement By Share-based Payment Award [Line Items] | | | | |
Allocated Share-based Compensation Expense | 172,000 | 118,000 | | |
Two Thousand Ten Repurchase Plan [Member] | | | | |
Common Share Repurchases [Line Items] | | | | |
Average Cost Per Repurchased Share | $17.93 | | | |
Number Of Shares Repurchased | 922,311 | | | |
Payments for Repurchase of Equity | $16,500,000 | | | |
Two Thousand Twelve Repurchase Plan [Member] | | | | |
Common Share Repurchases [Line Items] | | | | |
Number Of Shares Authorized To Be Repurchased | 1,000,000 | | | |