Summary of Significant Accounting Policies - Schedule of Error Corrections (Details) (USD $) In Thousands, 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
Net sales	$ 130,197	$ 125,525	$ 143,129	$ 129,529	$ 129,744	$ 127,279	$ 136,699	$ 120,147	$ 528,380	$ 513,869	$ 498,701
Cost of goods sold		77,473	88,755	81,524	83,749	79,833	88,105	77,006	332,466	328,693	332,309
Gross profit	45,483	48,052	54,374	48,005	45,995	47,446	48,594	43,141	195,914	185,176	166,392
Selling expenses		42,592	38,322	36,614	40,662	39,066	40,276	37,029	155,088	157,033	149,209
General and administrative expenses		7,498	10,329	8,500	7,970	8,874	7,771	7,531	35,724	32,146	29,144
Net gains from sales of assets		37	73	(123)	(79)	(1,185)	11	(3,213)	(3,814)	(4,467)	(268)
Impairment losses on goodwill and intangible assets					92				0	92	5,585
Pension withdrawal expense									0	0	4,568
Operating expenses		50,127	48,724	44,991	48,645	46,755	48,058	41,347	186,998	184,804	188,238
(Loss) income from operations	2,327	(2,075)	5,650	3,014	(2,650)	691	536	1,794	8,916	372	(21,846)
Dividend income		276	258	268	274	286	284	259	1,073	1,103	1,231
Interest income		114	110	108	169	92	99	92	429	452	214
Interest expense		(277)	(393)	(372)	(396)	(466)	(463)	(457)	(1,258)	(1,782)	(2,137)
Other, net		4,664	(514)	(906)	(1,569)	(1,949)	(7,645)	1,732	3,677	(9,432)	(4,385)
Total other expense		4,777	(539)	(902)	(1,522)	(2,037)	(7,725)	1,626	3,921	(9,659)	(5,077)
Loss before taxes		2,702	5,111	2,112	(4,172)	(1,346)	(7,189)	3,420	12,837	(9,287)	(26,923)
Loss before taxes		196	402	306	(1,194)	(40)	(32)	441	705	(825)	(347)
Net income (loss)	3,111	2,506	4,709	1,806	(2,978)	(1,306)	(7,157)	2,979	12,132	(8,462)	(26,576)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization									27,334	32,542	32,113
Recovery of doubtful accounts										(757)	(980)
Deferred income taxes									(137)	(74)	78
Net gains from sales of assets									3,814	4,467	268
ESOP and share-based compensation expense									4,692	3,563	3,287
Net losses on derivative instruments and investments										(11,132)	(6,175)
Restricted cash										6,472	1,153
Purchases of trading securities held for investment									(5,915)	(9,049)	(13,576)
Proceeds from sales of trading securities held for investment									4,290	7,633	18,267
Short-term investments										0	0
Accounts and notes receivable									(2,248)	2,429	(3,745)
Inventories									14,439	(5,115)	(13,236)
Income tax receivable									(181)	(353)	314
Prepaid expenses and other assets									661	156	860
Accounts payable									17,526	1,773	(13,441)
Accrued payroll expenses and other current liabilities									2,574	(8,785)	(4,239)
Accrued postretirement benefits									(1,905)	(6,451)	3,530
Other long-term liabilities									695	6,678	(6,320)
Net cash provided by operating activities									52,895	21,927	18,133
Previously Reported
Net sales		124,600	142,151	128,561	128,763	126,343	135,705	119,153		509,964	495,442
Cost of goods sold		76,810	86,713	79,089	81,273	78,761	85,352	74,532		318,825	322,540
Gross profit		47,790	55,438	49,472	47,490	47,582	50,353	44,621		191,139	172,902
Selling expenses		42,161	38,991	37,335	40,908	39,135	40,765	37,271		158,079	150,641
General and administrative expenses		7,667	10,724	9,246	9,219	8,941	9,041	8,769		37,063	34,222
Net gains from sales of assets		37	0	0	0	(1,185)	0	0		0	0
Impairment losses on goodwill and intangible assets					92					92	5,585
Pension withdrawal expense											4,568
Operating expenses		49,865	49,715	46,581	50,219	46,891	49,806	46,040		195,234	195,016
(Loss) income from operations		(2,075)	5,723	2,891	(2,729)	691	547	(1,419)		(4,095)	(22,114)
Dividend income		276	258	268	274	286	284	259		1,103	1,231
Interest income		114	110	108	169	92	99	92		452	214
Interest expense		(277)	(393)	(372)	(396)	(466)	(463)	(457)		(1,782)	(2,137)
Other, net		4,664	(587)	(783)	(1,490)	(1,949)	(7,656)	4,945		(4,965)	(4,117)
Total other expense		4,777	(612)	(779)	(1,443)	(2,037)	(7,736)	4,839		(5,192)	(4,809)
Loss before taxes		2,702	5,111	2,112	(4,172)	(1,346)	(7,189)	3,420		(9,287)	(26,923)
Loss before taxes		196	402	306	(1,194)	(40)	(32)	441		(825)	(347)
Net income (loss)		2,506	4,709	1,806	(2,978)	(1,306)	(7,157)	2,979		(8,462)	(26,576)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization										32,542	32,113
Recovery of doubtful accounts										(757)	(980)
Deferred income taxes										(74)	78
Net gains from sales of assets										4,467	268
ESOP and share-based compensation expense										3,563	3,287
Net losses on derivative instruments and investments										(11,132)	(6,175)
Restricted cash										6,472	1,153
Purchases of trading securities held for investment										0	0
Proceeds from sales of trading securities held for investment										0	0
Short-term investments										11,942	1,497
Accounts and notes receivable										2,429	(3,745)
Inventories										(5,115)	(13,236)
Income tax receivable										(353)	314
Prepaid expenses and other assets										156	860
Accounts payable										1,773	(13,441)
Accrued payroll expenses and other current liabilities										1,741	1,949
Accrued postretirement benefits										(6,451)	3,530
Other long-term liabilities										6,678	(6,320)
Net cash provided by operating activities										21,927	18,133
Scenario, Adjustment [Member]
Net sales										3,905	3,259
Cost of goods sold										9,868	9,769
Gross profit										(5,963)	(6,510)
Selling expenses										(1,046)	(1,432)
General and administrative expenses										(4,917)	(5,078)
Net gains from sales of assets										(4,467)	(268)
Impairment losses on goodwill and intangible assets										0	0
Pension withdrawal expense											0
Operating expenses										(10,430)	(6,778)
(Loss) income from operations										4,467	268
Dividend income										0	0
Interest income										0	0
Interest expense										0	0
Other, net										(4,467)	(268)
Total other expense										(4,467)	(268)
Loss before taxes										0	0
Loss before taxes										0	0
Net income (loss)										0	0
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization										0	0
Recovery of doubtful accounts										0	0
Deferred income taxes										0	0
Net gains from sales of assets										0	0
ESOP and share-based compensation expense										0	0
Net losses on derivative instruments and investments										0	0
Restricted cash										0	0
Purchases of trading securities held for investment										(9,049)	(13,576)
Proceeds from sales of trading securities held for investment										7,633	18,267
Short-term investments										(11,942)	(1,497)
Accounts and notes receivable										0	0
Inventories										0	0
Income tax receivable										0	0
Prepaid expenses and other assets										0	0
Accounts payable										0	0
Accrued payroll expenses and other current liabilities										(10,526)	(6,188)
Accrued postretirement benefits										0	0
Other long-term liabilities										0	0
Net cash provided by operating activities										$ 0	$ 0