Common Stock Buyback Plan (Details) - USD ($) $ in Thousands		3 Months Ended
	Mar. 27, 2015	May. 30, 2015	Jan. 23, 2015	Aug. 31, 2014	May. 31, 2014	Aug. 31, 2013
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount	$ 40,000		$ 10,000
Cash and cash equivalents		$ 13,795		$ 10,483	$ 5,337	$ 12,291
Stock repurchased during period, shares		401,198
Stock repurchased during period, value		$ 7,500
Minimum [Member]
Equity, Class of Treasury Stock [Line Items]
Cash and cash equivalents	10,000
Available cash for debt financing for repurchase common stock	$ 10,000