Summary of Significant Accounting Policies (Narrative) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		1 Months Ended		3 Months Ended												12 Months Ended
	May 04, 2017	Aug. 24, 2017	Mar. 21, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Dec. 14, 2015
Summary Of Significant Accounting Policies [Line Items]
Restricted cash				$ 220				$ 104								$ 220	$ 104
Common stock, shares authorized				75,000				75,000								75,000	75,000		40,000
Stock repurchase program, expiration date	May 2020
Stock repurchase program, shares authorized	5,000
Cash dividends paid				$ 0.065	$ 0.065	$ 0.065	$ 0.065	$ 0.06	$ 0.06	$ 0.06	$ 0.06	$ 0.06	$ 0.06	$ 0.06	$ 0.06
Dividends declared, per share																$ 0.26	$ 0.24	$ 0.24
Additional gross profit related to a change in estimate for product returns																		$ 3,497
Shared profits included in cost of sales related to collaborative arrangements																$ 54,454	$ 41,036	51,352
Property held for sale				$ 7,152				$ 6,868								7,152	6,868
Depreciation and amortization																$ 1,520	$ 1,522	$ 1,571
Senior Notes
Summary Of Significant Accounting Policies [Line Items]
Conversion price				$ 33.215												$ 33.215
Interest rate swap | Cash flow hedging | December 21, 2021
Summary Of Significant Accounting Policies [Line Items]
Derivative, notional amount			$ 100,000
Derivative, expiration date			Dec. 21, 2021
Additional interest cost rate of derivative			2.005%
Subsequent Event
Summary Of Significant Accounting Policies [Line Items]
Dividends declared, per share		$ 0.065
Dividends declared, date of declaration		Aug. 24, 2017
Dividends declared, date of distribution		Sep. 21, 2017
Dividends declared, date of record		Sep. 08, 2017