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Share-based payments (Tables)

12 Months Ended

Mar. 31, 2018

Summary of Share-based Compensation Expense

Share-based compensation expense during the years ended March 31, 2018, 2017 and 2016 are as follows:

		Year ended March 31,
		2018				2017				2016
Share-based compensation expense recorded in		$				$				$
Cost of revenue			3,770				2,765				1,923
Selling and marketing expenses			2,557				1,723				1,370
General and administrative expenses			24,238				18,548				14,626
Total share-based compensation expense		$	30,565			$	23,036			$	17,919

Movements in Number of Options Outstanding under 2006 Incentive Award Plan and Related Weighted Average Exercise Prices

Movements in the number of options outstanding under the 2006 Incentive Award Plan and their related weighted average exercise prices are as follow:

		Shares				Weighted average exercise price				Weighted average remaining contract term (in years)				Aggregate intrinsic value
Outstanding as at March 31, 2016			739,618			$	23.34				0.54			$	5,419
Exercised			(425,941	)			10.52
Lapsed			(196,498	)			13.44
Outstanding as at March 31, 2017			117,179			$	27.25				0.10			$	163
Exercised			(48,227	)			7.63
Lapsed			(68,952	)			7.87
Outstanding as at March 31, 2018			—				—				—				—
Options exercisable			—			$	—				—			$	—

RSUs dependent on non-market performance condition [member]

Movements in Number of Shares Outstanding under 2006 and 2016 Incentive Award Plan and Related Weighted Average Fair Values

(i) Movements in the number of RSUs dependent on non-market performance condition outstanding under the 2006 Incentive Award Plan and the 2016 Incentive Award Plan and their related weighted average fair values are as follow:

		Shares				Weighted average fair value				Weighted average remaining contract term (in years)				Aggregate intrinsic value
Outstanding as at March 31, 2016			1,448,312			$	19.25				7.78			$	44,376
Granted			516,264				30.26
Exercised			(343,623	)			20.18
Forfeited			(47,707	)			25.50
Lapsed			—				—
Outstanding as at March 31, 2017			1,573,246			$	22.47				7.50			$	45,011
Granted			497,689				30.85
Exercised			(961,111	)			21.45
Forfeited			(34,775	)			29.07
Lapsed			(2,216	)			23.47
Outstanding as at March 31, 2018			1,072,833			$	27.05				7.75			$	48,632
RSUs exercisable			309,312			$	20.90				5.94			$	14,021

RSUs dependent on market performance condition [member]

Movements in Number of Shares Outstanding under 2006 and 2016 Incentive Award Plan and Related Weighted Average Fair Values

Movements in the number of RSUs dependent on market performance condition outstanding under the 2006 Incentive Award Plan and the 2016 Incentive Award Plan and their related weighted average fair values are as follows:

		Shares				Weighted average fair value				Weighted average remaining contract term (in years)				Aggregate intrinsic value
Outstanding as at March 31, 2016			129,590			$	4.44				8.53			$	3,971
Granted			74,400				12.56
Exercised			—				—
Forfeited			—				—
Lapsed			—				—
Outstanding as at March 31, 2017			203,990			$	13.21				8.10			$	5,836
Granted			—
Exercised			—
Forfeited			—
Lapsed			—
Outstanding as at March 31, 2018			203,990				13.21				7.10			$	9,247
RSUs exercisable			—			$	—				—			$	—

RSUs related total shareholders return [member]

Movements in Number of Shares Outstanding under 2006 and 2016 Incentive Award Plan and Related Weighted Average Fair Values

Movements in the number of RSUs linked to the TSR condition outstanding under the 2016 Incentive Award Plan and their related weighted average fair values are as follows:

		Shares				Weighted average fair value				Weighted average remaining contract term (in years)				Aggregate intrinsic value
Outstanding as at March 31, 2017			—			$	—				—			$	—
Granted			248,655				36.52
Exercised			—
Forfeited			—
Lapsed			—
Outstanding as at March 31, 2018			248,655				36.52				9.08				11,272
RSUs exercisable			—			$	—				—			$	—

PSUs [member]

Movements in Number of Shares Outstanding under 2006 and 2016 Incentive Award Plan and Related Weighted Average Fair Values

Movements in the number of PSUs outstanding under the 2006 Incentive Award Plan and the 2016 Incentive Award Plan and their related weighted average fair values are as follow:

		Shares				Weighted average fair value				Weighted average remaining contract term (in years)				Aggregate intrinsic value
Outstanding as at March 31, 2016			951,588			$	17.83				7.77			$	29,157
Granted			422,062				31.12
Exercised			(141,741	)			14.11
Forfeited			(47,057	)			26.27
Outstanding as at March 31, 2017			1,184,852			$	21.00				7.36			$	33,899
Granted			400,463				30.35
Exercised			(506,660	)			16.79
Forfeited			(18,681	)			29.38
Outstanding as at March 31, 2018			1,059,975				26.36				7.51				48,048
PSUs exercisable			194,629			$	18.14				5.86			$	8,823

X

- Definition

The disclosure of information about indirect, by reference to the fair value of the equity instruments granted, measurement of the fair value of goods or services received as consideration for the entity's other equity instruments (ie other than share options).

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