Unaudited Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Jul. 31, 2015		Apr. 30, 2015		Jan. 31, 2015		Oct. 31, 2014		Jul. 31, 2014		Apr. 30, 2014		Jan. 31, 2014		Oct. 31, 2013		Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Net sales	$ 288,636		$ 290,227		$ 282,628		$ 310,240		$ 316,733		$ 309,577		$ 291,194		$ 307,530		$ 1,171,731	$ 1,225,034	$ 1,157,792
Gross margin	129,069		140,999		138,203		150,161		154,061		155,120		142,536		157,847		558,432	609,564	609,348
Operating income (loss)	(32,763)	[1]	24,285	[1]	16,811	[1]	26,973	[1]	(116,013)	[1]	26,767	[1]	18,346	[1]	29,689	[1]	35,306	(41,211)	(82,556)
Earnings (loss) from continuing operations	(39,394)		17,213		11,584		15,499		(96,981)		20,183		10,517		18,135		4,902	(48,146)	(138,257)
(Loss) earnings from discontinued operations, net of income taxes	$ 0		$ 0		$ 0		$ (1,915)	[2]	$ (13,428)	[2]	$ 3,904		$ 5,907		$ 5,795		(1,915)	2,178	(16,278)
Class A Nonvoting Common Stock [Member]
Earnings (loss) from continuing operations																	$ 4,902	$ (48,238)	$ (138,495)
Net earnings (loss) from continuing operations per Class A Common Share:
Earnings (loss) from continuing operations, per basic share	$ (0.77)	[3]	$ 0.34	[3]	$ 0.23	[3]	$ 0.30	[3]	$ (1.89)	[3]	$ 0.39	[3]	$ 0.20	[3]	$ 0.35	[3]	$ 0.10	$ (0.93)	$ (2.70)
Diluted (loss) earnings from continuing operations per Class A Common Share, as reported	(0.77)	[3]	0.33	[3]	0.23	[3]	0.30	[3]	(1.89)	[3]	0.39	[3]	0.20	[3]	0.35	[3]	0.10	(0.93)	(2.70)
Earnings (loss) from discontinued operations per Class A Common Share:
Basic (in dollars per share)	0.00	[3]	0.00	[3]	0.00	[3]	(0.03)	[3]	(0.26)	[3]	0.08	[3]	0.11	[3]	0.11	[3]	(0.04)	0.04	(0.32)
Diluted (in dollars per share)	$ 0.00	[3]	$ 0.00	[3]	$ 0.00	[3]	$ (0.04)	[3]	$ (0.26)	[3]	$ 0.08	[3]	$ 0.11	[3]	$ 0.11	[3]	$ (0.04)	$ 0.04	$ (0.32)

[1] * In fiscal 2015, the Company recorded before tax impairment charges of $46,867 in the fourth quarter ended July 31, 2015 and before tax restructuring charges of $4,278, $4,879, $4,834 and $2,830 in the first, second, third, and fourth quarters of fiscal 2015, respectively, for a total of $16,821. In fiscal 2014, the Company recorded before tax impairment charges of $148,551 in the fourth quarter ended July 31, 2014 and before tax restructuring charges of $6,840, $4,324, $3,039, and $809 in the first, second, third and fourth quarters of fiscal 2014, respectively, for a total of $15,012.

[2] ** In fiscal 2015, the loss from discontinued operations included a net loss on operations of $1,489 primarily related to professional fees associated with the divestiture and a $426 net loss on the sale of Die-Cut, recorded in the first quarter ended October 31, 2014. In the fourth quarter of fiscal 2014, the Company incurred restructuring charges of $6,989 and a net loss on the sale of the Die Cut business of $1,238 in discontinued operations

[3] *** The sum of the quarters does not equal the year-to-date total for fiscal 2015 and fiscal 2014 due to the quarterly changes inweighted-average shares outstanding.