Acquisition (table) (detail) - USD ($)	Jul. 01, 2017	Apr. 03, 2017	Apr. 01, 2014
Business Acquisition [Line Items]
Purchase Price	$ 14,420,000
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities [Abstract]
Total	14,420,000
Truitt Bros. Inc. [Member]
Business Acquisition [Line Items]
Purchase Price	31,842,000	$ 14,420,000	$ 16,242,000
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities [Abstract]
Current assets	22,823,000
Other long term assets	1,744,000
Property, plant and equipment	28,696,000
Other long term liabilities	(15,664,000)
Deferred tax asset	407,000
Current liabilities	(5,068,000)
Gain on Purchase of Business	(1,096,000)
Total	$ 31,842,000	$ 14,420,000	$ 16,242,000