Summary of Significant Accounting Policies - Schedule of Earnings Per Share Basic and Diluted (Detail) - shares	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Basic weighted shares	19,826,000	20,669,000	21,104,000
Treasury stock impact of stock options	178,000	221,000	268,000
Diluted weighted shares	20,004,000	20,890,000	21,372,000