DIVIDENDS AND EARNINGS PER SHARE (TABLES)

3 Months Ended

Jun. 30, 2012

Comprehensive Income and Earning Per Share [Abstract]

Schedule of antidilutive securities

		Three Months Ended
		June 30,
		2012		2011
Options:
	Outstanding	376,490		274,063
	Weighted average exercise price	$	43.65	$	30.16
Restricted stock units:
	Outstanding	72,592		4,040
	Weighted average price	$	46.59	$	53.89
Restricted stock awards:
	Outstanding	0		39,220
	Weighted average price	$	0.00	$	43.79

Schedule Of Earnings Per Share Basic And Diluted [Table Text Block]

					Three Months Ended
					June 30,
					2012		2011
Net income available to common stockholders (in thousands):
		Income available to common stockholders – basic			$	23,662	$	21,045
		Interest expense on assumed conversion of 3% Convertible Senior Notes, net of tax (1)				0		0
		Income available to common stockholders – diluted			$	23,662	$	21,045
Shares:
	Weighted average number of common shares outstanding – basic				35,789,700		36,352,371
		(1)				0		0
		Net effect of dilutive stock options, restricted stock units and restricted stock awards
				based on the treasury stock method		659,888		713,840
	Weighted average number of common shares outstanding – diluted				36,449,588		37,066,211
	Basic earnings per common share				$	0.66	$	0.58
	Diluted earnings per common share				$	0.65	$	0.57
(1)			Diluted earnings per common share for the three months ended June 30, 2012 and 2011 excludes approximately 1.5 million potentially dilutive shares initially issuable upon the conversion of our 3% Convertible Senior Notes. The 3% Convertible Senior Notes will be convertible, under certain circumstances, using a net share settlement process, into a combination of cash and our Common Stock. As of June 30, 2012, the base conversion price of the notes was approximately $76.56, based on the base conversion rate of 13.0609 shares of Common Stock per $1,000 principal amount of convertible notes (subject to adjustment in certain circumstances, including the payment of dividends). In general, upon conversion of a note, the holder will receive cash equal to the principal amount of the note and Common Stock to the extent of the note’s conversion value in excess of such principal amount. In addition, if at the time of conversion the applicable price of our Common Stock exceeds the base conversion price, holders will receive up to an additional 8.4049 shares of our Common Stock per $1,000 principal amount of notes, as determined pursuant to a specified formula. Such shares did not impact our calculation of diluted earnings per share for three months ended June 30, 2012 and 2011 as our stock price did not meet or exceed the base conversion price.