Equity - Additional Information (Detail) (USD $)	3 Months Ended		1 Months Ended				3 Months Ended		1 Months Ended
	Oct. 31, 2013	Jul. 31, 2013	Dec. 31, 2013 Class A Common Stock [Member]	Jul. 31, 2013 Class A Common Stock [Member]	Dec. 31, 2013 Class B Common Stock [Member]	Jul. 31, 2013 Class B Common Stock [Member]	Oct. 31, 2012 Class B Common Stock [Member]	Oct. 31, 2013 Class B Common Stock [Member]	Aug. 30, 2013 Fabrix [Member]	Aug. 31, 2013 Fabrix [Member]
Equity Textual [Abstract]
Date of declared dividend will be paid			Jan. 07, 2014		Jan. 07, 2014
Dividends payable		$ 1,837,000
Dividend paid per share			$ 0.17	$ 0.08	$ 0.17	$ 0.08
Stock repurchase program, shares authorized for repurchase								8,300,000
Purchase of stock of subsidiary	1,133,000								1,100,000
Noncontrolling interests purchased percentage										2.80%
Equity method investment, ownership percentage										88.40%
Stock repurchased in a fiscal year							77,843
Aggregate purchase price of shares repurchased							800,000
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased								5,100,000
Stockholders' Equity Note, Spinoff Transaction	$ (1,624,000)
Reduction in exercise price of options outstanding	15.29%
Option to purchase shares in spin-off	32,155