GENERAL (Details) (USD $)	3 Months Ended		6 Months Ended		0 Months Ended		3 Months Ended	0 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Segment	Sep. 30, 2012	Nov. 12, 2013 Subsequent Event	Aug. 02, 2012 Fourth Stock Repurchase Program Maximum	Sep. 30, 2013 Fifth Stock Repurchase Program	May 07, 2013 Fifth Stock Repurchase Program Maximum
Nature of Operations
Number of reporting segments			1
Stock Repurchase Program
Authorized amount of repurchase of common stock						$ 35,000,000		$ 35,000,000
Maximum dollar value of shares that may still be purchased under stock repurchase program							$ 35,000,000
Number of shares repurchased under the stock repurchase program							0
Dividends
Dividends declared (in dollars per share)	$ 0.50	$ 0.50	$ 1.00	$ 1.00	$ 0.50
Dividends paid (in dollars per share)	$ 0.50	$ 0.50	$ 1.00	$ 1.00