GENERAL (Details) (USD $)	3 Months Ended		6 Months Ended		0 Months Ended			6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 segment	Sep. 30, 2013	Nov. 10, 2014 Subsequent Event	Dec. 31, 2014 Subsequent Event Forecast	May 07, 2012 Fifth Stock Repurchase Program	Sep. 30, 2014 Fifth Stock Repurchase Program	Sep. 30, 2014 Fifth Stock Repurchase Program Subsequent Event
Nature of Operations
Number of reporting segments			1
Stock Repurchase Program
Authorized amount of repurchase of common stock							$ 35,000,000
Number of shares repurchased under the stock repurchase program								0	65,200
Maximum dollar value of shares that may still be purchased under stock repurchase program								$ 35,000,000
Average price of shares repurchased									$ 48.33
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		$ 0.50