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STOCKHOLDERS' EQUITY (Details 2) (USD $)	0 Months Ended		12 Months Ended	0 Months Ended
STOCKHOLDERS' EQUITY (Details 2) (USD $)	May 14, 2012 Third Stock Repurchase Program Maximum	Aug. 02, 2012 Additional Stock Repurchase Program Maximum	Mar. 31, 2013 Stock Repurchase Program	May 07, 2013 Fifth Stock Repurchase Program Maximum Subsequent Event
Stock Repurchase Program
Authorized amount of repurchase of common stock	$ 35,000,000	$ 35,000,000		$ 35,000,000
Number of shares repurchased under the stock repurchase program			1,013,655
Average price of repurchased shares of stock (in dollars per share)			$ 56.86
Remaining balance available under the program to repurchase shares			$ 12,316,000

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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