Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jun. 30, 2014	$ 282,283	$ 279	$ 119,777	$ 177,237	$ (16,595)	$ (182)	$ 1,767
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	7,802						7,802
Net income (loss)	(13,118)			6,241			(19,359)
Other comprehensive income (loss)	(5,996)					(5,996)
Exercise of stock options	493		(275)		768
Tax effect of exercised stock options and vesting of deferred shares	1,764		1,764
Issuance of deferred shares	0		(4,628)		4,628
Treasury shares sold to Employee Stock Purchase Plan	215		94		121
Other treasury share purchases	(2,472)				(2,472)
Stock-based compensation expense	4,730		4,730
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Mar. 31, 2015	275,701	279	121,462	183,478	(13,550)	(6,178)	(9,790)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Jun. 30, 2015	284,554	279	123,038	194,394	(18,489)	(5,926)	(8,742)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance	10,892						10,892
Net income (loss)	16,403			19,729			(3,326)
Other comprehensive income (loss)	(1,061)					(1,061)
Exercise of stock options	578		7		571
Tax effect of exercised stock options and vesting of deferred shares	3,222		3,222
Issuance of deferred shares	0		(5,777)		5,777
Treasury shares sold to Employee Stock Purchase Plan	261		142		119
Open market purchases of treasury shares	(5,460)				(5,460)
Other treasury share purchases	(4,540)				(4,540)
Stock-based compensation expense	5,023		5,023
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Mar. 31, 2016	$ 309,872	$ 279	$ 125,655	$ 214,123	$ (22,022)	$ (6,987)	$ (1,176)