Stockholder's Investments (Tables)

12 Months Ended

Jul. 31, 2014

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

The following tables summarize the RSU and restricted share activity for the fiscal years ended July 31, 2014, 2013, and 2012:

Service-Based RSUs and Restricted Shares	Shares		Weighted Average Grant Date  Fair Value
Balance as of July 31, 2012	—		$	—
New grants	5,000		32.99
Vested	—		—
Forfeited	—		—
Balance as of July 31, 2013	5,000		$	32.99
New grants	108,055		30.93
Vested	—		—
Forfeited	(8,198	)	31.05
Balance as of July 31, 2014	104,857		$	31.02

Performance-Based RSUs and Restricted Shares	Shares		Weighted Average Grant Date  Fair Value
Balance as of July 31, 2012	310,000		$	31.38
New grants	10,000		30.21
Vested	(33,333	)	28.35
Forfeited	(55,000	)	32.83
Balance as of July 31, 2013	231,667		$	31.43
New grants	—		—
Vested	(35,001	)	28.35
Forfeited	(116,666	)	31.61
Balance as of July 31, 2014	80,000		$	32.50

Schedule of Capital Stock

Information as to the Company’s capital stock at July 31, 2014 and 2013 is as follows:

	July 31, 2014				July 31, 2013
	Shares Authorized	Shares Issued	(thousands) Amount		Shares Authorized	Shares Issued	(thousands) Amount
Preferred Stock, $.01 par value	5,000,000				5,000,000
Cumulative Preferred Stock: 6% Cumulative	5,000				5,000
1972 Series	10,000				10,000
1979 Series	30,000				30,000
Common Stock, $.01 par value: Class A Nonvoting	100,000,000	51,261,487	$	513	100,000,000	51,261,487	$	513
Class B Voting	10,000,000	3,538,628	35		10,000,000	3,538,628	35
			$	548			$	548

Schedule of Other Activity in Stockholders' Investment

The following is a summary of other activity in stockholders’ investment for the fiscal years ended July 31, 2014, 2013, and 2012:

	Unearned Restricted Stock			Deferred Compensation			Shares Held in Rabbi Trust, at cost			Total
Balances at July 31, 2011	$	(5,362	)	$	12,093		$	(11,595	)	$	(4,864	)
Shares at July 31, 2011				560,078			560,078
Sale of shares at cost	—			(1,407		)	1,368			(39		)
Purchase of shares at cost	—			924			(924		)	—
Amortization of restricted stock	1,599			—			—			1,599
Balances at July 31, 2012	(3,763		)	11,610			(11,151		)	(3,304		)
Shares at July 31, 2012				$	517,105		$	517,105
Sale of shares at cost	$	—		(1,461		)	1,419			$	(42	)
Purchase of shares at cost	—			891			(891		)	—
Forfeitures of restricted stock	838			—			—			838
Amortization of restricted stock	1,788			—			—			1,788
Balances at July 31, 2013	$	(1,137	)	$	11,040		$	(10,623	)	$	(720	)
Shares at July 31, 2013				469,797			469,797
Sale of shares at cost	—			(1,637		)	1,496			(141		)
Purchase of shares at cost	—			821			(821		)	—
Effect of plan amendment	—			(2,435		)	—			(2,435		)
Amortization of restricted stock	1,137			—			—			1,137
Balances at July 31, 2014	$	—		$	7,789		$	(9,948	)	$	(2,159	)
Shares at July 31, 2014				338,711			423,415

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range

The following table summarizes information about stock options outstanding at July 31, 2014:

	Options Outstanding				Options Outstanding  and Exercisable
Range of Exercise Prices	Number of  Shares Outstanding at July 31, 2014	Weighted  Average Remaining Contractual Life (in years)	Weighted Average Exercise Price		Shares Exercisable at July 31, 2014	Weighted  Average Remaining Contractual Life (in years)	Weighted Average Exercise Price
$17.00 - $27.99	664,383	6.2	$	25.00	504,258	5.8	$	24.32
$28.00 - $37.99	2,956,377	5.7	30.66		1,916,590	4.4	30.77
$38.00 - $40.99	583,500	2.8	38.26		583,500	2.8	38.26
Total	4,204,260	5.4	30.82		3,004,348	4.3	$	31.15

Summary of Stock Option Activity under Company's Share-Based Compensation Plans

for the fiscal years ended July 31, 2014, 2013, and 2012:

	Option Price				Options Outstanding		Weighted Average Exercise Price
Balance as of July 31, 2011	$	13.31	—	$40.37	5,726,017		$	29.24
Options granted	27.00		—	33.54	1,212,450		27.91
Options exercised	13.31		—	29.78	(266,991	)	20.21
Options cancelled	16.00		—	38.31	(417,725	)	31.16
Balance as of July 31, 2012	$	13.31	—	$40.37	6,253,751		$	29.24
Options granted	30.21		—	36.25	828,450		30.58
Options exercised	13.31		—	31.54	(1,080,089	)	22.79
Options cancelled	16.39		—	38.31	(895,527	)	30.02
Balance as of July 31, 2013	$	17.23	—	$40.37	5,106,585		$	30.68
Options granted	29.28		—	31.07	375,272		30.98
Options exercised	17.33		—	30.21	(490,507	)	26.45
Options cancelled	20.95		—	38.31	(787,090	)	32.71
Balance as of July 31, 2014	$	17.23	—	$40.37	4,204,260		$	30.82