DIVIDENDS, SHARE REPURCHASES AND EARNINGS PER SHARE (TABLES)

3 Months Ended

Jun. 30, 2013

Dividends, Share Repurchases and Earning Per Share [Abstract]

Schedule of antidilutive securities

	Three Months Ended   June 30,
	2013		2012
Options:
Outstanding	396,801		376,490
Weighted average exercise price	$	47.40	$	43.65
Restricted stock units:
Outstanding	—		72,592
Weighted average price	$	—	$	46.59
Restricted stock awards:
Outstanding	43,077		—
Weighted average price	$	62.65	$	—

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

	Three Months Ended   June 30,
	2013		2012
Net income available to common stockholders (in thousands):
Income available to common stockholders – basic	$	26,886	$	23,662
Interest expense on assumed conversion of 3% Convertible Senior Notes, net of tax (1)	—		—
Income available to common stockholders – diluted	$	26,886	$	23,662
Shares:
Weighted average number of common shares outstanding – basic	36,182,708		35,789,700
Assumed conversion of 3% Convertible Senior Notes outstanding during the period (1)	—		—
Net effect of dilutive stock options, restricted stock units and restricted stock awards based on the treasury stock method	393,577		659,888
Weighted average number of common shares outstanding – diluted	36,576,285		36,449,588
Basic earnings per common share	$	0.74	$	0.66
Diluted earnings per common share	$	0.74	$	0.65