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Intangible assets (Tables) | 12 Months Ended
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Mar. 31, 2019
Text block [abstract] |
Change in Carrying Value of Intangible Assets | The changes in the carrying value of intangible assets for the year ended March 31, 2018 are as follows:
Gross carrying value |  | Customer contracts |  |  | Customer relationships |  |  | Intellectual Property and other rights |  |  | Trade names |  |  | Technology |  |  | Leasehold benefits |  |  | Covenant not-to- compete |  |  | Service mark |  |  | Software |  |  | Total |
Balance as at April 1, 2017 |  | $ | 167,001 |  |  | $ | 121,922 |  |  | $ | 3,861 |  |  | $ | 653 |  |  | $ | 6,131 |  |  | $ | 1,835 |  |  | $ | 9,451 |  |  |  | 400 |  |  | $ | 25,586 |  |  | $ | 336,840 |
Additions |  |  | — |  |  |  | — |  |  |  | 250 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 7,369 |  |  |  | 7,619 |
Translation adjustments |  |  | 93 |  |  |  | 940 |  |  |  | 470 |  |  |  | — |  |  |  | (6 | ) |  |  | — |  |  |  | 10 |  |  |  | — |  |  |  | 894 |  |  |  | 2,401 |
Balance as at March 31, 2018 |  | $ | 167,094 |  |  | $ | 122,862 |  |  | $ | 4,581 |  |  | $ | 653 |  |  | $ | 6,125 |  |  | $ | 1,835 |  |  | $ | 9,461 |  |  | $ | 400 |  |  | $ | 33,849 |  |  | $ | 346,860 |
Accumulated amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance as at April 1, 2017 |  | $ | 157,976 |  |  | $ | 62,175 |  |  | $ | 3,861 |  |  | $ | 80 |  |  | $ | 172 |  |  | $ | 1,835 |  |  | $ | 964 |  |  | $ | — |  |  | $ | 13,153 |  |  | $ | 240,216 |
Amortization |  |  | 2,725 |  |  |  | 3,700 |  |  |  | 74 |  |  |  | 236 |  |  |  | 790 |  |  |  | — |  |  |  | 2,310 |  |  |  | — |  |  |  | 5,670 |  |  |  | 15,505 |
Translation adjustments |  |  | (62 | ) |  |  | 873 |  |  |  | 470 |  |  |  | (1 | ) |  |  | (4 | ) |  |  | — |  |  |  | 12 |  |  |  | — |  |  |  | 199 |  |  |  | 1,487 |
Balance as at March 31, 2018 |  | $ | 160,639 |  |  | $ | 66,748 |  |  | $ | 4,405 |  |  | $ | 315 |  |  | $ | 958 |  |  | $ | 1,835 |  |  | $ | 3,286 |  |  | $ | — |  |  | $ | 19,022 |  |  | $ | 257,208 |
Net carrying value as at March 31, 2018 |  | $ | 6,455 |  |  | $ | 56,114 |  |  | $ | 176 |  |  | $ | 338 |  |  | $ | 5,167 |  |  | $ | — |  |  | $ | 6,175 |  |  | $ | 400 |  |  | $ | 14,827 |  |  | $ | 89,652 |
The changes in the carrying value of intangible assets for the year ended March 31, 2019 are as follows:
Gross carrying value |  | Customer contracts |  |  | Customer relationships |  |  | Intellectual Property and other rights |  |  | Trade names |  |  | Technology |  |  | Leasehold benefits |  |  | Covenant not-to- compete |  |  | Service mark |  |  | Software |  |  | Total |
Balance as at April 1, 2018 |  | $ | 167,094 |  |  | $ | 122,862 |  |  | $ | 4,581 |  |  | $ | 653 |  |  | $ | 6,125 |  |  | $ | 1,835 |  |  | $ | 9,461 |  |  |  | 400 |  |  | $ | 33,849 |  |  | $ | 346,860 |
Additions |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 7,556 |  |  |  | 7,556 |
Translation adjustments |  |  | (5,146 | ) |  |  | (1,225 | ) |  |  | (298 | ) |  |  | (6 | ) |  |  | (73 | ) |  |  | — |  |  |  | (172 | ) |  |  | — |  |  |  | (1,742 | ) |  |  | (8,662 | )
Balance as at March 31, 2019 |  | $ | 161,948 |  |  | $ | 121,637 |  |  | $ | 4,283 |  |  | $ | 647 |  |  | $ | 6,052 |  |  | $ | 1,835 |  |  | $ | 9,289 |  |  | $ | 400 |  |  | $ | 39,663 |  |  | $ | 345,754 |
Accumulated amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance as at April 1, 2018 |  | $ | 160,639 |  |  | $ | 66,748 |  |  | $ | 4,405 |  |  | $ | 315 |  |  | $ | 958 |  |  | $ | 1,835 |  |  | $ | 3,286 |  |  | $ | — |  |  | $ | 19,022 |  |  | $ | 257,208 |
Amortization |  |  | 2,675 |  |  |  | 3,671 |  |  |  | 125 |  |  |  | 192 |  |  |  | 776 |  |  |  | — |  |  |  | 2,240 |  |  |  | — |  |  |  | 6,104 |  |  |  | 15,783 |
Translation adjustments |  |  | (4,940 | ) |  |  | (1,031 | ) |  |  | (298 | ) |  |  | (6 | ) |  |  | (17 | ) |  |  | — |  |  |  | (79 | ) |  |  | — |  |  |  | (1,054 | ) |  |  | (7,425 | )
Balance as at March 31, 2019 |  | $ | 158,374 |  |  | $ | 69,338 |  |  | $ | 4,232 |  |  | $ | 501 |  |  | $ | 1,717 |  |  | $ | 1,835 |  |  | $ | 5,447 |  |  | $ | — |  |  | $ | 24,072 |  |  | $ | 265,566 |
Net carrying value as at March 31, 2019 |  | $ | 3,574 |  |  | $ | 52,249 |  |  | $ | 51 |  |  | $ | 146 |  |  | $ | 4,335 |  |  | $ | — |  |  | $ | 3,842 |  |  | $ | 400 |  |  | $ | 15,591 |  |  | $ | 80,188 |
Estimated Remaining Weighted Average Amortization Periods for Definite Lived Intangible Assets | As at March 31, 2019, the estimated remaining weighted average amortization periods for definite lived intangible assets are as follows:
|  | Balance life |
|  | (in months) |
Customer contracts |  |  | 19 |
Customer relationships |  |  | 196 |
Covenant not-to-compete |  |  | 21 |
Trade names |  |  | 10 |
Technology |  |  | 68 |
Intellectual property and other rights |  |  | 5 |
Software |  |  | 20 |
Estimated Annual Amortization Expense | The estimated annual amortization expense based on remaining weighted average amortization periods for intangible assets and exchange rates, each as at March 31, 2019 are as follows:
|  | Amount |
2020 |  | $ | 15,716 |
2021 |  |  | 12,078 |
2022 |  |  | 7,000 |
2023 |  |  | 5,649 |
2024 |  |  | 4,398 |
Thereafter |  |  | 34,947 |
|  | $ | 79,788 | *
* | excludes service mark, as it has an indefinite useful life

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- Definition The disclosure of detailed information about intangible assets. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2018-01-01 -Paragraph 118 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2018-03-01&anchor=para_118&doctype=Standard -URIDate 2018-03-16 + Details
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