Stockholders' Equity (Tables)

9 Months Ended

Dec. 31, 2015

Equity [Abstract]

Weighted average assumptions used in estimating the value of the award

Weighted-average assumptions used in estimating the value of the TSR award were as follows:

	Nine Months Ended December 31, 2015		Year Ended March 31, 2015
Risk-free rate	1.02	%	1.02	%
Expected volatility	22.81	%	22.81	%
Expected dividend yield	1.78	%	1.78	%
Expected award life	3		3

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

Weighted-average assumptions used in estimating the value of the grants were as follows:

	Nine Months Ended December 31, 2015	Years Ended
		March 31, 2015	March 31, 2014
Risk-free rate	1.99%	1.82%	1.86%-2.07%
Expected volatility	27.91%	27.67%	25.95%-26.71%
Expected dividend yield	1.17%	0.99%	1.27%-1.58%
Expected option life	7 years	7 years	7 years

Schedule of stock option activity

The Company's stock option activity was as follows:

	Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (in years)	Aggregate Intrinsic Value (per option)
Outstanding, March 31, 2013	262,248		$	61.72	2.7	$	—
Granted	47,490		130.86
Exercised	(13,173	)	55.32
Forfeited/expired	(26,160	)	62.34
Outstanding, March 31, 2014	270,405		$	74.11	8.3	$	68.04
Granted	73,100		72.06
Converted in conjunction with the Merger	11,225		27.45
Outstanding, March 31, 2015	354,730		$	41.83	7.8	$	34.80
Granted	1,443		73.13
Exercised	(122,893	)	30.90
Outstanding, December 31, 2015	233,280		$	47.79	7.7	$	41.55
Options exercisable at:
December 31, 2015	109,509		$	32.43	6.6	$	56.91
March 31, 2015	230,715		$	64.32	7.0	$	44.99
March 31, 2014	114,083		$	61.63	8.0	$	80.52

Schedule of performance share award, TSR award, and restricted stock award activity

The Company's nonvested stock-based compensation awards activity was as follows:

	Performance Share and TSR Awards		Restricted Stock Units		Restricted Stock Awards		Combined Weighted Average Grant Date Fair Value
Nonvested, March 31, 2013	491,016		—		267,426		$	65.42
Granted	113,212		—		127,451		114.65
Canceled/forfeited	(200,557	)	—		(13,526	)	68.65
Vested	(95,579	)	—		(98,407	)	66.60
Nonvested, March 31, 2014	308,092		—		282,944		$	83.91
Granted	161,661		—		139,094		81.88
Converted in conjunction with the Merger	—		647,436		—		71.29
Canceled/forfeited	(309,223	)	—		(13,521	)	87.05
Vested	—		(146,497	)	(195,882	)	72.50
Nonvested, March 31, 2015	160,530		500,939		212,635		$	77.02
Granted	2,976		—		86,108		74.88
Canceled/forfeited	(5,374	)	(10,908	)	(9,914	)	80.88
Vested	(333	)	(191,084	)	(17,806	)	43.87
Nonvested, December 31, 2015	157,799		298,947		271,023		$	75.57