CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Chase Stockholders' Equity	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Noncontrolling Interest	Total
Balance at Aug. 31, 2014	$ 136,552	$ 910	$ 13,620	$ (4,250)	$ 126,272	$ 938	$ 137,490
Balance (in shares) at Aug. 31, 2014		9,103,292
Increase (Decrease) in Stockholders' Equity
Restricted stock grants, net of forfeitures		$ 3	(3)
Restricted stock grants, net of forfeitures (in shares)		29,785
Amortization of restricted stock grants	866		866				866
Amortization of stock option grants	254		254				254
Exercise of stock options	2,571	$ 17	2,554				2,571
Exercise of stock options (in shares)		169,038
Common stock received for payment of stock option exercises	(2,180)	$ (6)	(2,174)				(2,180)
Common stock received for payment of stock option exercises (in shares)		(58,332)
Excess tax benefit (expense) from stock-based compensation	1,088		1,088				1,088
Common stock retained to pay statutory minimum withholding taxes on common stock	(2,000)	$ (5)	(1,995)				(2,000)
Common stock retained to pay statutory minimum withholding taxes on common stock (in shares)		(51,825)
Cash dividend paid, $0.70, $0.65 and $0.60 per share for years ended August 31, 2017, 2016 and 2015, respectively (per share)	(5,477)				(5,477)		(5,477)
Purchase of outstanding noncontrolling interest	86		86			(1,033)	(947)
Change in funded status of pension plan, net of tax $519, $738 and $697, respectively	(1,149)			(1,149)			(1,149)
Foreign currency translation adjustment	(2,425)			(2,425)			(2,425)
Net unrealized gain (loss) on restricted investments, net of tax of $30, $4 and ($77), respectively	(162)			(162)			(162)
Net income	26,318				26,318	$ 95	26,413
Balance at Aug. 31, 2015	154,342	$ 919	14,296	(7,986)	147,113		154,342
Balance (in shares) at Aug. 31, 2015		9,191,958
Increase (Decrease) in Stockholders' Equity
Restricted stock grants, net of forfeitures		$ 3	(3)
Restricted stock grants, net of forfeitures (in shares)		29,884
Amortization of restricted stock grants	1,049		1,049				1,049
Amortization of stock option grants	283		283				283
Exercise of stock options	2,139	$ 14	2,125				2,139
Exercise of stock options (in shares)		140,113
Common stock received for payment of stock option exercises	(2,015)	$ (3)	(2,012)				(2,015)
Common stock received for payment of stock option exercises (in shares)		(35,932)
Excess tax benefit (expense) from stock-based compensation	1,784		1,784				1,784
Common stock retained to pay statutory minimum withholding taxes on common stock	(2,808)	$ (5)	(2,803)				(2,808)
Common stock retained to pay statutory minimum withholding taxes on common stock (in shares)		(47,537)
Cash dividend paid, $0.70, $0.65 and $0.60 per share for years ended August 31, 2017, 2016 and 2015, respectively (per share)	(5,999)				(5,999)		(5,999)
Change in funded status of pension plan, net of tax $519, $738 and $697, respectively	(1,402)			(1,402)			(1,402)
Foreign currency translation adjustment	(6,098)			(6,098)			(6,098)
Net unrealized gain (loss) on restricted investments, net of tax of $30, $4 and ($77), respectively	7			7			7
Net income	32,807				32,807		32,807
Balance at Aug. 31, 2016	174,089	$ 928	14,719	(15,479)	173,921		174,089
Balance (in shares) at Aug. 31, 2016		9,278,486
Increase (Decrease) in Stockholders' Equity
Restricted stock grants, net of forfeitures		$ 4	(4)
Restricted stock grants, net of forfeitures (in shares)		44,567
Amortization of restricted stock grants	1,712		1,712				1,712
Amortization of stock option grants	500		500				500
Exercise of stock options	1,253	$ 8	1,245				1,253
Exercise of stock options (in shares)		80,168
Common stock received for payment of stock option exercises	(1,158)	$ (2)	(1,156)				(1,158)
Common stock received for payment of stock option exercises (in shares)		(15,079)
Common stock retained to pay statutory minimum withholding taxes on common stock	(2,959)	$ (3)	(2,956)				(2,959)
Common stock retained to pay statutory minimum withholding taxes on common stock (in shares)		(34,006)
Cash dividend paid, $0.70, $0.65 and $0.60 per share for years ended August 31, 2017, 2016 and 2015, respectively (per share)	(6,532)				(6,532)		(6,532)
Change in funded status of pension plan, net of tax $519, $738 and $697, respectively	1,155			1,155			1,155
Foreign currency translation adjustment	788			788			788
Net unrealized gain (loss) on restricted investments, net of tax of $30, $4 and ($77), respectively	67			67			67
Net income	42,014				42,014		42,014
Balance at Aug. 31, 2017	$ 210,929	$ 935	$ 14,060	$ (13,469)	$ 209,403		$ 210,929
Balance (in shares) at Aug. 31, 2017		9,354,136