Fair Value Measurements (Assumptions for Mortgage Servicing Rights) (Details) $ in Thousands	Sep. 26, 2015 USD ($) Loans	Jun. 27, 2015	Mar. 28, 2015 USD ($) Loans
Fair Value Disclosures [Abstract]
Number of loans serviced with MSRs | Loans	3,549		3,306
Weighted average servicing fee (basis points)		0.3018%	0.2988%
Capitalized servicing multiple	60.80%		42.10%
Capitalized servicing rate (basis points)		0.1835%	0.1258%
Serviced portfolio with MSRs	$ 408,920		$ 380,120
Mortgage servicing rights	$ 750		$ 475