The Company and a Summary of Its Significant Accounting Policies - Summary of Impact of Adopting New Standards on Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Apr. 01, 2018	Mar. 31, 2018
Disaggregation Of Revenue [Line Items]
Accounts receivable, net	$ 300,307		$ 267,665
Inventories	234,518		196,307
Prepaid expenses and other current assets	90,646		77,135
Other assets	758,805		686,134
Accrued liabilities	308,268		263,676
Retained earnings	245,585		$ 285,960
ASC 606 [Member]
Disaggregation Of Revenue [Line Items]
Accounts receivable, net		$ 262,001
Inventories		197,930
Prepaid expenses and other current assets		95,233
Other assets		705,241
Accrued liabilities		269,592
Retained earnings		313,208
Impact of ASC 606 [Member] \| ASC 606 [Member]
Disaggregation Of Revenue [Line Items]
Accounts receivable, net	1,774	(5,664)
Inventories	(1,681)	1,623
Prepaid expenses and other current assets	(18,562)	18,098
Other assets	(26,723)	19,107
Accrued liabilities	(5,687)	5,916
Retained earnings	(39,504)	$ 27,248
Historical Accounting Method [Member] \| ASC 606 [Member]
Disaggregation Of Revenue [Line Items]
Accounts receivable, net	302,081
Inventories	232,837
Prepaid expenses and other current assets	72,084
Other assets	732,082
Accrued liabilities	302,581
Retained earnings	$ 206,081

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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