CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
Balance at Jun. 30, 2013	$ 278	$ 72,845	$ 118,615	$ 2,902	$ 194,640
Balance (in shares) at Jun. 30, 2013	27,831
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			29,000		29,000
Other comprehensive income (loss)				2,470	2,470
Stock issued pursuant to employee stock incentive plans		93			93
Stock issued pursuant to employee stock incentive plans (in shares)	7
Issuance of restricted stock, including dividends and net of forfeitures	$ 3	(3)
Issuance of restricted stock, including dividends and net of forfeitures (in shares)	282
Stock issued in connection with the PACK acquisition	$ 3	5,682			5,685
Stock issued in connection with the PACK acquisition (in shares)	260
Dividends declared $0.24 per share for June 30, 2014, 2015 and 2016, respectively			(6,847)		(6,847)
Share-based compensation		3,136			3,136
Exercise of stock options	$ 4	3,651			3,655
Exercise of stock options (in shares)	392
Tax benefit from employee stock incentive plans		1,752			1,752
Balance at Jun. 30, 2014	$ 288	87,156	140,768	5,372	233,584
Balance (in shares) at Jun. 30, 2014	28,772
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			33,483		33,483
Other comprehensive income (loss)				(12,468)	(12,468)
Stock issued pursuant to employee stock incentive plans		77			77
Stock issued pursuant to employee stock incentive plans (in shares)	5
Issuance of restricted stock, including dividends and net of forfeitures	$ 2	(2)
Issuance of restricted stock, including dividends and net of forfeitures (in shares)	224
Dividends declared $0.24 per share for June 30, 2014, 2015 and 2016, respectively			(7,043)		(7,043)
Share-based compensation		4,515			4,515
Exercise of stock options	$ 2	1,271			1,273
Exercise of stock options (in shares)	146
Tax benefit from employee stock incentive plans		790			790
Balance at Jun. 30, 2015	$ 292	93,807	167,208	(7,096)	254,211
Balance (in shares) at Jun. 30, 2015	29,147
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			34,766		34,766
Other comprehensive income (loss)				771	771
Stock issued pursuant to employee stock incentive plans		113			113
Stock issued pursuant to employee stock incentive plans (in shares)	7
Issuance of restricted stock, including dividends and net of forfeitures	$ 3	(3)
Issuance of restricted stock, including dividends and net of forfeitures (in shares)	346
Sale of warrants		13,685			13,685
Purchase of call option (hedge)		(27,174)			(27,174)
Allocation of proceeds from convertible senior notes		27,241			27,241
Equity component of debt issuance costs		(976)			(976)
Deferred taxes related to convertible senior notes		330			330
Dividends declared $0.24 per share for June 30, 2014, 2015 and 2016, respectively			(7,170)		(7,170)
Share-based compensation		6,697			6,697
Exercise of stock options	$ 1	728			729
Exercise of stock options (in shares)	95
Tax benefit from employee stock incentive plans		1,219			1,219
Balance at Jun. 30, 2016	$ 296	$ 115,667	$ 194,804	$ (6,325)	$ 304,442
Balance (in shares) at Jun. 30, 2016	29,595