STOCKHOLDERS' EQUITY, Share Repurchase Program (Details) - Current Program [Member]	Oct. 31, 2017 shares
Common Shares [Member]
Equity, Class of Treasury Stock [Line Items]
Number of shares repurchased to date (in shares)	4,600
Class A Common Shares [Member]
Equity, Class of Treasury Stock [Line Items]
Number of shares repurchased to date (in shares)	913,331
Class A Common Shares or Common Shares [Member]
Equity, Class of Treasury Stock [Line Items]
Number of shares authorized for repurchase (in shares)	2,000,000