SHARE-BASED COMPENSATION: (Tables)

9 Months Ended

Dec. 31, 2015

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, 2015	4,870,219		$	15.10
Granted	445,785		$	17.84
Exercised	(625,256	)	$	8.63		$	7,048
Forfeited or cancelled	(781,791	)	$	27.11
Outstanding at December 31, 2015	3,908,957		$	14.04	5.11	$	28,178
Exercisable at December 31, 2015	2,678,043		$	14.27	3.68	$	18,885

Summary of stock options outstanding and exercisable

	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
$   0.63 - $   8.90	809,387	6.31 years	$	1.70	439,366	$	1.69
$ 11.08 - $ 14.42	1,204,258	4.37 years	$	13.18	1,090,931	$	13.16
$ 15.10 - $ 19.76	851,168	5.60 years	$	17.15	436,121	$	16.57
$ 20.44 - $ 25.00	1,024,502	4.58 years	$	21.87	701,761	$	22.18
$ 26.33 - $ 62.06	19,642	7.83 years	$	32.83	9,864	$	32.80
	3,908,957	5.11 years	$	14.04	2,678,043	$	14.27

Summary of SAR 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, 2015	245,404	$	40.00
Outstanding at December 31, 2015	245,404	$	40.00	1.25	$	—
Exercisable at December 31, 2015	—	$	—	—	$	—

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

	Number of shares		Weighted-average fair value per share at grant date		Weighted-average remaining contractual term (in years)
Outstanding at March 31, 2015	2,053,179		$	20.40	1.95
Granted	1,231,173		$	18.76
Vested	(920,050	)	$	20.12
Forfeited or cancelled	(176,784	)	$	19.46
Outstanding at December 31, 2015	2,187,518		$	19.67	2.24

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

	Number of shares		Weighted-average fair value per share at grant date		Weighted-average remaining contractual term (in years)
Outstanding at March 31, 2015	389,310		$	21.12	1.57
Granted	347,125		$	18.32
Forfeited or cancelled	(87,759	)	$	19.88
Outstanding at December 31, 2015	648,676		$	19.79	1.54

Summary of other performance unit activity

	Number of shares	Weighted-average fair value per share at grant date		Weighted-average remaining contractual term (in years)
Outstanding at March 31, 2015	312,575	$	5.23
Granted	323,080	$	2.94
Outstanding at December 31, 2015	635,655	$	4.07	1.55