Segment Reporting (Reconciliation of Segment Assets to Total Consolidated Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 29, 2012	Mar. 31, 2012	Dec. 31, 2011
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 893,685	$ 888,023	$ 889,176
Operating segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	953,093		941,639
Corporate eliminations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ (59,408)		$ (52,463)