Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement.

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Number of share options (or share units) exercised during the current period.

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Amount of stock repurchase plan authorized.

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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Current receivable and payables related to tax withholding for share based compensation.

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Current receivables from stock option exercises.

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Share Based compensation arrangement by share based payment award unsettled shares.

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Stockholders' Equity - Additional Information (Detail) - USD ($)			3 Months Ended	12 Months Ended
	Apr. 02, 2019	Mar. 29, 2019	Mar. 31, 2019	Dec. 31, 2018	Apr. 30, 2018	Nov. 30, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Current receivable and payables related to tax withholding			$ 5,400,000
Common Class A [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares exercised			5,097,000
2018 Share Repurchase Program [Member] \| Common Class A [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Repurchase of common stock			0
2018 Share Repurchase Program [Member] \| Common Class A [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock repurchase program, authorized amount					$ 200,000,000
2016 Share Repurchase Program [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Treasury stock acquired, average cost per share				$ 3.59
Stock repurchase program, aggregate number of shares repurchased value				$ 65,400,000
2016 Share Repurchase Program [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock repurchase program, authorized amount						$ 200,000,000
2016 Share Repurchase Program [Member] \| Common Class A [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Repurchase of common stock				18.2
Director [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares exercised		3,200,000
Number of unsettled shares			2,100,000
Current receivables from stock option exercises			$ 400,000
Director [Member] \| Subsequent Event [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cash received	$ 5,800,000