SHARE-BASED COMPENSATION: (Tables)

9 Months Ended

Dec. 31, 2013

SHARE-BASED COMPENSATION:

Schedule of option activity

	Number of shares		Weighted-average exercise price per share		Weighted-average remaining contractual term (in years)	Aggregate intrinsic value (in thousands)
Outstanding at March 31, 2013	8,193,248		$	20.85
Granted	321,060		$	22.15
Exercised	(3,248,762	)	$	20.51		$	53,505
Forfeited or cancelled	(191,019	)	$	35.83
Outstanding at December 31, 2013	5,074,527		$	20.59	3.99	$	84,680
Exercisable at December 31, 2013	3,901,170		$	22.02	2.66	$	59,857

Summary of stock options outstanding and exercisable

Following is a summary of stock options outstanding and exercisable as of December 31, 2013:

	Options outstanding				Options exercisable
Range of exercise price per share	Options outstanding	Weighted- average remaining contractual life	Weighted-average exercise price per share		Options exercisable	Weighted-average exercise price per share
$ 6.32 -     $ 9.62	43,321	4.04 years	$	8.72	43,321	$	8.72
$ 11.08 - $ 15.00	1,797,500	6.39 years	$	13.17	944,310	$	12.89
$ 15.10 - $ 19.82	830,068	2.66 years	$	16.41	820,286	$	16.40
$ 20.12 - $ 25.00	1,342,504	3.98 years	$	22.71	1,051,671	$	23.06
$ 25.98 - $ 29.30	357,691	0.85 years	$	27.41	357,691	$	27.41
$ 30.93 - $ 39.12	544,472	0.90 years	$	36.15	524,920	$	36.27
$ 40.88 - $ 62.06	158,971	1.41 years	$	42.77	158,971	$	42.77
	5,074,527	3.99 years	$	20.59	3,901,170	$	22.02

Schedule of non-vested time-vesting restricted stock unit activity

	Number of shares		Weighted average fair value per share at grant date (in thousands)		Weighted-average remaining contractual term (in years)
Outstanding at March 31, 2013	1,212,286		$	13.99	2.24
Granted	488,231		$	23.03
Vested	(470,548	)	$	13.81
Forfeited or cancelled	(133,565	)	$	16.32
Outstanding at December 31, 2013	1,096,404		$	17.81	2.38

Schedule of non-vested performance-based restricted stock unit activity

	Number of shares		Weighted average fair value per share at grant date (in thousands)		Weighted-average remaining contractual term (in years)
Outstanding at March 31, 2013	863,721		$	11.52	1.63
Granted	225,515		$	23.63
Forfeited or cancelled	(32,774	)	$	18.67
Outstanding at December 31, 2013	1,056,462		$	13.88	1.15