Unaudited Quarterly Financial Data (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 139,580	$ 124,830	$ 116,508	$ 129,261	$ 123,115	$ 150,871	$ 113,956	$ 111,748	$ 510,179	$ 499,690	$ 444,388
Gross profit	29,022	24,963	26,984	33,734	24,531	31,527	20,708	21,505	114,703	98,271	82,032
Net income	$ 5,554	$ 5,356	$ 6,755	$ 11,335	$ 5,402	$ 7,593	$ 4,513	$ 4,820	$ 29,000	$ 22,328	$ 16,981
Net income (loss) per diluted share	$ 0.19	$ 0.19	$ 0.24	$ 0.4	$ 0.19	$ 0.28	$ 0.17	$ 0.18	$ 1.02	$ 0.81	$ 0.63