Stock-Based Compensation - Assumptions to Estimate Fair Value of Option Grants (Detail)	9 Months Ended
	Dec. 31, 2013
2014 $3.03 Value Per Option | Black Scholes Based Option Pricing Model
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend yield	0.00%
Volatility	31.20%
Risk-free interest rate	1.30%
Expected term of options (in years)	7 years
Forfeiture adjustment	0.00%
2014 $3.01 Value Per Option | Black Scholes Based Option Pricing Model
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend yield	0.00%
Volatility	31.20%
Risk-free interest rate	1.30%
Expected term of options (in years)	7 years
Forfeiture adjustment	0.00%
2013 $3.05 Value Per Option | Black Scholes Based Option Pricing Model
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend yield	0.00%
Volatility	34.00%
Risk-free interest rate	1.20%
Expected term of options (in years)	7 years
Forfeiture adjustment	0.00%
2013 $3.02 Value Per Option | Black Scholes Based Option Pricing Model
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend yield	0.00%
Volatility	35.50%
Risk-free interest rate	1.20%
Expected term of options (in years)	7 years
Forfeiture adjustment	0.00%
2013 $3.02 Value Per Option | Black Scholes Based Option Pricing Model
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend yield	0.00%
Volatility	34.90%
Risk-free interest rate	1.10%
Expected term of options (in years)	7 years
Forfeiture adjustment	0.00%
2013 $2.82 Value Per Option | Black Scholes Based Option Pricing Model
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend yield	0.00%
Volatility	30.90%
Risk-free interest rate	1.30%
Expected term of options (in years)	7 years
Forfeiture adjustment	0.00%
2014 $1.90 Value Per Option | Monte Carlo Simulation
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend yield	0.00%
Volatility	34.90%
Risk-free interest rate	1.90%
Expected term of options (in years)	10 years
Forfeiture adjustment	1.10%
Suboptimal behavior factor	1.7
2014 $1.71 Value Per Option | Monte Carlo Simulation
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend yield	0.00%
Volatility	34.90%
Risk-free interest rate	1.90%
Expected term of options (in years)	10 years
Forfeiture adjustment	1.80%
Suboptimal behavior factor	1.7
2013 $1.86 Value Per Option | Monte Carlo Simulation
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend yield	0.00%
Volatility	34.00%
Risk-free interest rate	1.80%
Expected term of options (in years)	10 years
Forfeiture adjustment	0.20%
Suboptimal behavior factor	1.9
2013 $1.75 Value Per Option | Monte Carlo Simulation
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend yield	0.00%
Volatility	34.90%
Risk-free interest rate	1.10%
Expected term of options (in years)	10 years
Forfeiture adjustment	0.20%
Suboptimal behavior factor	1.9
2013 $1.75 Value Per Option | Monte Carlo Simulation
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend yield	0.00%
Volatility	30.10%
Risk-free interest rate	1.30%
Expected term of options (in years)	10 years
Forfeiture adjustment	0.20%
Suboptimal behavior factor	1.9