Share-based Payments (Details) - USD ($)	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Stock Options [Member]
Summary of Black-Scholes option pricing model assumptions used to derive weighted average fair value of stock options granted [Abstract]
Weighted average risk-free interest rate (in hundredths)	1.82%	1.75%
Weighted average expected holding period (years)	5 years	5 years 4 days
Weighted average expected volatility (in hundredths)	49.02%	46.02%
Weighted average expected dividend yield (in hundredths)	0.00%	0.00%
Weighted average fair value of options granted (in dollars per share)	$ 13.77	$ 9.65
Number of Shares [Roll Forward]
Outstanding at beginning of period (in shares)	1,389,254
Granted (in shares)	2,722	82,537
Exercised (in shares)	(183,635)
Cancelled (in shares)	0
Outstanding at end of period (in shares)	1,208,341
Weighted Average Exercise Price [Roll Forward]
Outstanding at beginning of period (in dollars per share)	$ 9.97
Granted (in dollars per share)	31.10
Exercised (in dollars per share)	9.72
Cancelled (in dollars per share)	0
Outstanding at end of period (in dollars per share)	$ 10.05
Number of stock options exercisable (in shares)	913,506
Weighted average exercise price of stock options exercisable (in dollars per share)	$ 9.08
Total unrecognized compensation expense	$ 1,257,000
Weighted average vesting period over which compensation expense is expected to be recognized	1 year 3 months
Restricted Stock (RSUs) [Member]
Weighted Average Exercise Price [Roll Forward]
Weighted average vesting period over which compensation expense is expected to be recognized	1 year 6 months
Number of Shares [Roll Forward]
Non-vested restricted stock at beginning of period (in shares)	181,443
Restricted stock granted (in shares)	0	95,645
Restricted stock vested (in shares)	(30,417)
Restricted stock cancelled (in shares)	0
Non-vested restricted stock at end of period (in shares)	151,026
Weighted Average Grant Date Fair Value [Roll Forward]
Non-vested restricted stock at beginning of period (in dollars per share)	$ 16.84
Restricted stock granted (in dollars per share)	0
Restricted stock vested (in dollars per share)	24.27
Restricted stock cancelled (in dollars per share)	0
Non-vested restricted stock at end of period (in dollars per share)	$ 15.34
Total unrecognized compensation expense	$ 1,994,000