STOCK BASED COMPENSATION (Tables)

12 Months Ended

Aug. 31, 2017

STOCK BASED COMPENSATION [Abstract]

Summary of Shares Authorized and Shares Available for Future Grants

		Shares available to grant
	Shares authorized for issuance as of August 31, 2017	August 31,		August 31,
	(including shares originally authorized for issuance under prior plans)	2017		2016
2013 Plan	944,905		637,822		615,889

Summary of Components of Stock-Based Compensation Expense

	Years Ended August 31,
	2017		2016		2015
Options granted to directors	$	18	$	72	$	86
Restricted stock awards		7,301		7,103		4,599
Restricted stock units		2,370		1,946		1,284
Stock-based compensation expense	$	9,689	$	9,121	$	5,969

Summary of Other Information Related to Stock-Based Compensation

	Balance as of
	August 31,		August 31,		August 31,
	2017		2016		2015
Remaining unrecognized compensation cost (in thousands)	$	26,382	$	32,380	$	18,421
Weighted average period of time over which this cost will be recognized (years)		3		4		5

	Years Ended
	August 31,		August 31,		August 31,
	2017		2016		2015
Excess tax benefit (deficiency) on stock-based compensation (in thousands)	$	165	$	610	$	1,206

Summary of Restricted Stock Awards and Units Activity

	Years Ended
	August 31,		August 31,		August 31,
	2017		2016		2015
Grants outstanding at beginning of period		509,880		366,021		488,416
Granted		56,724		276,530		36,382
Forfeited		(40,023)		(1,372)		(10,738)
Vested		(122,213)		(131,299)		(148,039)
Grants outstanding at end of period		404,368		509,880		366,021

Summary of Weighted Average Per Share Grant Date Fair Value for Restricted Stock Awards and Units

	Years Ended
	August 31,		August 31,		August 31,
Weighted Average Grant Date Fair Value	2017		2016		2015
Restricted stock awards and units granted	$	87.43	$	84.69	$	88.40
Restricted stock awards and units vested	$	77.85	$	71.19	$	45.20
Restricted stock awards and units forfeited	$	77.19	$	—	$	65.67

Summary of Total Fair Market Value of Restricted Stock Awards and Units Vested

	Years Ended
	August 31,		August 31,		August 31,
	2017		2016		2015
Total fair market value of restricted stock awards and units vested (in thousands)	$	10,135	$	10,139	$	13,192

Summary of Shares Repurchased

	Years Ended
	August 31,		August 31,		August 31,
	2017		2016		2015
Shares repurchased		38,634		43,171		52,396
Cost of repurchase of shares (in thousands)	$	3,193	$	3,334	$	4,677