Other Intangible Assets - Other Intangible Assets (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Cost	$ 8,901,000	$ 8,901,000
Amortization Expense	450,000	457,000
Accumulated Amortization	4,614,000	4,165,000
Cost, Net of Accumulated Amortization	$ 4,287,000	$ 4,736,000
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Life	5 years	5 years
Cost	$ 775,000	$ 775,000
Amortization Expense	13,000	20,000
Accumulated Amortization	775,000	762,000
Cost, Net of Accumulated Amortization	0	13,000
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	7,922,000	7,922,000
Amortization Expense	423,000	423,000
Accumulated Amortization	3,721,000	3,299,000
Cost, Net of Accumulated Amortization	$ 4,201,000	$ 4,623,000
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Life	18 years	18 years
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Life	20 years	20 years
Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Life	15 years	15 years
Cost	$ 204,000	$ 204,000
Amortization Expense	14,000	14,000
Accumulated Amortization	118,000	104,000
Cost, Net of Accumulated Amortization	$ 86,000	$ 100,000