Fair Value of Financial Instruments (Details 2) (Fair value of assets and liabilities that are not measured on a recurring basis, USD $) In Thousands, unless otherwise specified	Sep. 29, 2013	Mar. 31, 2013
Carrying Amount
Assets and liabilities that are not measured on a recurring basis
Fixed rate debt	$ 542,496	$ 538,877
Variable rate debt	612,500	535,000
Fair Value
Assets and liabilities that are not measured on a recurring basis
Fixed rate debt	638,966	596,467
Variable rate debt	$ 611,194	$ 534,513