Fair Value Measurements (Assets Measured at Fair Value on a Recurring Basis) (Details) (USD $)	12 Months Ended
	Mar. 30, 2013	Dec. 29, 2012 Total [Member] Recurring [Member] Interest rate lock commitments [Member]		Dec. 29, 2012 Total [Member] Recurring [Member] Forward loan sale commitments [Member]		Dec. 29, 2012 Total [Member] Recurring [Member] Mortgage servicing rights [Member]		Dec. 29, 2012 Total [Member] Recurring [Member] Securities issued by the U.S Treasury and Government [Member]		Dec. 29, 2012 Total [Member] Recurring [Member] Mortgage-backed securities [Member]		Dec. 29, 2012 Total [Member] Recurring [Member] Securities issued by states and political subdivisions [Member]		Dec. 29, 2012 Total [Member] Recurring [Member] Corporate debt securities [Member]		Dec. 29, 2012 Total [Member] Recurring [Member] Marketable equity securities [Member]		Dec. 29, 2012 Level 1 [Member] Recurring [Member] Interest rate lock commitments [Member]		Dec. 29, 2012 Level 1 [Member] Recurring [Member] Forward loan sale commitments [Member]		Dec. 29, 2012 Level 1 [Member] Recurring [Member] Mortgage servicing rights [Member]		Dec. 29, 2012 Level 1 [Member] Recurring [Member] Securities issued by the U.S Treasury and Government [Member]		Dec. 29, 2012 Level 1 [Member] Recurring [Member] Mortgage-backed securities [Member]		Dec. 29, 2012 Level 1 [Member] Recurring [Member] Securities issued by states and political subdivisions [Member]		Dec. 29, 2012 Level 1 [Member] Recurring [Member] Corporate debt securities [Member]		Dec. 29, 2012 Level 1 [Member] Recurring [Member] Marketable equity securities [Member]		Dec. 29, 2012 Level 2 [Member] Recurring [Member] Interest rate lock commitments [Member]		Dec. 29, 2012 Level 2 [Member] Recurring [Member] Forward loan sale commitments [Member]		Dec. 29, 2012 Level 2 [Member] Recurring [Member] Mortgage servicing rights [Member]		Dec. 29, 2012 Level 2 [Member] Recurring [Member] Securities issued by the U.S Treasury and Government [Member]		Dec. 29, 2012 Level 2 [Member] Recurring [Member] Mortgage-backed securities [Member]		Dec. 29, 2012 Level 2 [Member] Recurring [Member] Securities issued by states and political subdivisions [Member]		Dec. 29, 2012 Level 2 [Member] Recurring [Member] Corporate debt securities [Member]		Dec. 29, 2012 Level 2 [Member] Recurring [Member] Marketable equity securities [Member]		Dec. 29, 2012 Level 3 [Member] Recurring [Member] Interest rate lock commitments [Member]		Dec. 29, 2012 Level 3 [Member] Recurring [Member] Forward loan sale commitments [Member]		Dec. 29, 2012 Level 3 [Member] Recurring [Member] Mortgage servicing rights [Member]		Dec. 29, 2012 Level 3 [Member] Recurring [Member] Securities issued by the U.S Treasury and Government [Member]		Dec. 29, 2012 Level 3 [Member] Recurring [Member] Mortgage-backed securities [Member]		Dec. 29, 2012 Level 3 [Member] Recurring [Member] Securities issued by states and political subdivisions [Member]		Dec. 29, 2012 Level 3 [Member] Recurring [Member] Corporate debt securities [Member]		Dec. 29, 2012 Level 3 [Member] Recurring [Member] Marketable equity securities [Member]
Summary of Assets Measured at Fair Value on a Recurring Basis
Assets fair value		$ 28,000	[1]	$ (3,000)	[1]	$ 335,000	[2]	$ 2,687,000	[3]	$ 5,139,000	[3]	$ 1,713,000	[3]	$ 2,836,000	[3]	$ 5,323,000	[3]	$ 0	[1]	$ 0	[1]	$ 0	[2]	$ 0	[3]	$ 0	[3]	$ 0	[3]	$ 0	[3]	$ 5,323,000	[3]	$ 0	[1]	$ 0	[1]	$ 0	[2]	$ 2,687,000	[3]	$ 5,139,000	[3]	$ 1,713,000	[3]	$ 2,836,000	[3]	$ 0	[3]	$ 28,000	[1]	$ (3,000)	[1]	$ 335,000	[2]	$ 0	[3]	$ 0	[3]	$ 0	[3]	$ 0	[3]	$ 0	[3]
Fair Value, Assets, Level 1, Level 2, or Level 3 Transfers, Amount	$ 0

[1] Gains or losses on derivatives are recognized in current period earnings through cost of sales.

[2] Changes in the fair value of mortgage servicing rights are recognized in the current period earnings through net revenue.

[3] Unrealized gains or losses on investments are recorded in accumulated other comprehensive income (loss) at each measurement date.