SHARE-BASED COMPENSATION: (Tables)

3 Months Ended

Jun. 30, 2016

SHARE-BASED COMPENSATION:

Schedule of option activity

				Weighted-average
		Weighted-average		remaining	Aggregate
	Number of	exercise price		contractual term	Intrinsic value
	shares	per share		(in years)	(in thousands)
Outstanding at March 31, 2016	3,604,102	$	14.52
Exercised	(158,632)	$	9.00		$	1,997
Forfeited or cancelled	(28,441)	$	13.42
Outstanding at June 30, 2016	3,417,029	$	14.78	5.1	$	25,363
Exercisable at June 30, 2016	2,645,523	$	15.03	4.3	$	19,033

Summary of stock options outstanding and exercisable

					Options outstanding					Options exercisable
Range of						Weighted-average		Weighted-average			Weighted-average
exercise price					Options	remaining		exercise price		Options	exercise price
per share					outstanding	contractual life		per share		exercisable	per share
$	0.85	-	$	9.99	626,572	6.8	years	$	1.85	387,045	$	1.85
$	10.00	-	$	19.99	1,756,862	5.1	years	$	15.10	1,439,173	$	14.51
$	20.00	-	$	24.99	1,014,043	4.1	years	$	21.88	809,531	$	22.06
$	25.00	-	$	32.85	19,552	7.4	years	$	32.85	9,774	$	32.85
					3,417,029	5.1	years	$	14.78	2,645,523	$	15.03

Schedule of stock appreciation right (SAR) activity

				Weighted-average
			Weighted-average	remaining		Aggregate
	Number		exercise price	contractual term		intrinsic value
	of shares		per share	(in years)		(in thousands)
Outstanding at March 31, 2016	245,404	$	40.00
Outstanding at June 30, 2016	245,404	$	40.00	0.75	$	—
Exercisable at June 30, 2016	—	$	—	—	$	—

Schedule of performance stock option unit activity

				Weighted-average
			Weighted-average	remaining		Aggregate
	Number		exercise price	contractual term		intrinsic value
	of shares		per share	(in years)		(in thousands)
Outstanding at March 31, 2016	—	$	—
Granted	622,084	$	21.32
Outstanding at June 30, 2016	622,084	$	21.32	2.9	$	417
Exercisable at June 30, 2016	—	$	—	—	$	—

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

Non-vested time-vesting restricted stock unit activity for the three-month period ended June 30, 2016 was:

		Weighted average
		fair value per		Weighted-average
	Number	share at  grant		remaining contractual
	of shares	date		term (in years)
Outstanding at March 31, 2016	2,279,895	$	19.69	2.12
Granted	1,099,159	$	21.25
Vested	(334,886)	$	18.44
Forfeited or cancelled	(34,028)	$	19.71
Outstanding at June 30, 2016	3,010,140	$	20.40	2.61

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

Non-vested performance-based restricted stock unit activity for the three-month period ended June 30, 2016 was:

		Weighted average
		fair value per		Weighted-average
	Number	share at  grant		remaining contractual
	of shares	date		term (in years)
Outstanding at March 31, 2016	516,818	$	18.62	1.67
Granted	254,420	$	24.66
Forfeited or cancelled	(8,898)	$	17.43
Outstanding at June 30, 2016	762,340	$	20.65	1.87

Schedule of other performance unit activity

		Weighted average
		fair value per		Weighted-average
	Number	share at grant		remaining contractual
	of shares	date		term (in years)
Outstanding at March 31, 2016	635,655	$	4.07	1.30
Outstanding at June 30, 2016	635,655	$	4.07	1.05