Earning Per Share-Basic (detail) (USD $)	3 Months Ended		9 Months Ended
	Dec. 27, 2014	Dec. 28, 2013	Dec. 27, 2014	Dec. 28, 2013
Basic
Net Earnings (Loss)	$ 7,819,000	$ 6,846,000	$ 7,134,000	$ 14,796,000
Deduct preferred stock dividends	6,000	6,000	17,000	17,000
Undistributed Earnings, Basic	7,813,000	6,840,000	7,117,000	14,779,000
Undistributed Earnings Allocated to Participating Securities	102,000	218,000	122,000	472,000
Earnings (Loss) Attributable to Common Stock	$ 7,711,000	$ 6,622,000	$ 6,995,000	$ 14,307,000
Weighted Average Number of Shares Outstanding, Basic	10,733,000	10,743,000	10,769,000	10,748,000
Basic earnings (loss) per common share	$ 0.72	$ 0.62	$ 0.65	$ 1.33