v3.7.0.1

Acquisitions - Additional Information (Detail) |  | 12 Months Ended
--- | --- | ---
Jul. 23, 2015 USD ($) | Mar. 31, 2017 USD ($) | Mar. 31, 2016 USD ($) | Mar. 31, 2015 USD ($) acquisition
Business Acquisition [Line Items] |  |  |  |
Purchase of businesses |  | $ 12,392,000 | $ 35,439,000 | $ 0
Goodwill relating to acquisitions |  | 1,122,000 | 14,395,000 |
Estimated tax-deductible goodwill |  | $ 19,857,000 | $ 20,766,000 |
Number of businesses acquired | acquisition |  |  |  | 0
ICS Industires Pty, Ltd [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Purchase of businesses | $ 34,496,000 |  |  |
Estimated tax-deductible goodwill | 0 |  |  |
ICS Industires Pty, Ltd [Member] | Customer Relationships |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Acquired intangible assets | 10,211,000 |  |  |
ICS Industires Pty, Ltd [Member] | Technology |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Acquired intangible assets | 1,399,000 |  |  |
ICS Industires Pty, Ltd [Member] | Non-compete |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Acquired intangible assets | 142,000 |  |  |
ICS Industires Pty, Ltd [Member] | Goodwill [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill relating to acquisitions | $ 13,898,000 |  |  |
Minimum |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Estimated useful lives of finite-lived assets |  | 3 years |  |
Minimum | ICS Industires Pty, Ltd [Member] | Non-compete |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Estimated useful lives of finite-lived assets | 2 years |  |  |
Maximum |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Estimated useful lives of finite-lived assets |  | 20 years |  |
Maximum | ICS Industires Pty, Ltd [Member] | Technology |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Estimated useful lives of finite-lived assets | 10 years |  |  |
Maximum | ICS Industires Pty, Ltd [Member] | Non-compete |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Estimated useful lives of finite-lived assets | 5 years |  |  |
Average | ICS Industires Pty, Ltd [Member] | Customer Relationships |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Estimated useful lives of finite-lived assets | 11 years |  |  |
Trademarks | ICS Industires Pty, Ltd [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Acquired indefinite-lived intangible assets | $ 1,322,000 |  |  |

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