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Stockholders' Equity (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 29, 2018 | Sep. 30, 2017 | Sep. 29, 2018 | Sep. 30, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance, common stock, shares |  |  | 9,044,858 |
Ending balance, common stock, shares | 9,097,359 |  | 9,097,359 |
Beginning balance |  |  | $ 457,106 |
Net income | $ 15,576 | $ 6,182 | 35,267 | $ 17,935
Adjustments to Additional Paid in Capital, Share-based Compensation and Exercise of Stock Options |  |  | (173) |
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition |  |  | 2,115 |
Other Comprehensive Income (Loss) |  |  | (21) |
Ending balance | $ 494,748 |  | $ 494,748 |
Common Stock |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance, common stock, shares |  |  | 9,044,858 |
Stock option exercises, shares |  |  | 52,501 |
Ending balance, common stock, shares | 9,097,359 |  | 9,097,359 |
Beginning balance |  |  | $ 90 |
Net income |  |  | 0 |
Adjustments to Additional Paid in Capital, Share-based Compensation and Exercise of Stock Options |  |  | 1 |
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition |  |  | 0 |
Other Comprehensive Income (Loss) |  |  | 0 |
Ending balance | $ 91 |  | 91 |
Additional paid-in capital |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance |  |  | 246,197 |
Net income |  |  | 0 |
Adjustments to Additional Paid in Capital, Share-based Compensation and Exercise of Stock Options |  |  | (174) |
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition |  |  | 2,115 |
Other Comprehensive Income (Loss) |  |  | 0 |
Ending balance | 248,138 |  | 248,138 |
Retained earnings |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance |  |  | 209,381 |
Net income |  |  | 35,267 |
Adjustments to Additional Paid in Capital, Share-based Compensation and Exercise of Stock Options |  |  | 0 |
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition |  |  | 0 |
Other Comprehensive Income (Loss) |  |  | 0 |
Ending balance | 246,723 |  | 246,723 |
Accumulated other comprehensive income |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Beginning balance |  |  | 1,438 |
Net income |  |  | 0 |
Adjustments to Additional Paid in Capital, Share-based Compensation and Exercise of Stock Options |  |  | 0 |
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition |  |  | 0 |
Other Comprehensive Income (Loss) |  |  | (21) |
Ending balance | (204) |  | (204) |
Accounting Standards Update 2016-01 [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets | 1,621 |  | 1,621 |
Accounting Standards Update 2016-01 [Member] | Reclassification out of Accumulated Other Comprehensive Income [Domain] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets | (1,621) |  | (1,621) |
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets | $ 454 |  | $ 454 |

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