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Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 29, 2018 | Mar. 31, 2018 | Sep. 30, 2017 | Sep. 29, 2018 | Sep. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Accrued Liabilities, Current | $ 130,083 | $ 126,500 |  | $ 130,083 |
Liabilities, Current | 196,728 | 176,329 |  | 196,728 |
Deferred income taxes | 8,580 | 7,577 |  | 8,580 |
Retained earnings | 246,723 | 209,381 |  | 246,723 |
Stockholders' Equity Attributable to Parent | 494,748 | 457,106 |  | 494,748 |
Revenues | 241,530 |  | $ 200,507 | 487,933 | $ 407,323
Cost of Revenue | 192,114 |  | 165,953 | 387,041 | 330,803
Gross Profit | 49,416 |  | 34,554 | 100,892 | 76,520
Selling, General and Administrative Expense | 30,035 |  | 26,153 | 59,248 | 52,458
Operating Income (Loss) | 19,381 |  | 8,401 | 41,644 | 24,062
Income before income taxes | 19,517 |  | 8,499 | 43,653 | 24,150
Income Tax Expense (Benefit) | (3,941) |  | (2,317) | (8,386) | (6,215)
Net income | 15,576 |  | 6,182 | 35,267 | 17,935
Calculated under Revenue Guidance in Effect before Topic 606 [Member] |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
Accrued Liabilities, Current | 132,090 |  |  | 132,090 |
Liabilities, Current | 198,735 |  |  | 198,735 |
Deferred income taxes | 8,031 |  |  | 8,031 |
Retained earnings | 245,265 |  |  | 245,265 |
Stockholders' Equity Attributable to Parent | 493,290 |  |  | 493,290 |
Revenues | 232,370 |  |  | 465,104 |
Cost of Revenue | 183,423 |  |  | 365,961 |
Gross Profit | 48,947 |  |  | 99,143 |
Selling, General and Administrative Expense | 29,899 |  |  | 58,804 |
Operating Income (Loss) | 19,048 |  |  | 40,339 |
Income before income taxes | 19,184 |  |  | 42,348 |
Income Tax Expense (Benefit) | (3,865) |  |  | (8,085) |
Net income | 15,319 |  |  | 34,263 |
Accounting Standards Update 2014-09 [Member] |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Operating Results | (469) |  |  | (1,749) |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income | (257) |  |  | (1,004) |
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income | 6,200 |  | $ 5,000 | 12,800 | $ 10,100
Revenue from Contract with Customer [Member] | Accounting Standards Update 2014-09 [Member] |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income | (9,160) |  |  | (22,829) |
Cost of Sales [Member] | Accounting Standards Update 2014-09 [Member] |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income | (8,691) |  |  | (21,080) |
Selling, General and Administrative Expenses [Member] | Accounting Standards Update 2014-09 [Member] |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income | (136) |  |  | (444) |
Operating Income (Loss) [Member] | Accounting Standards Update 2014-09 [Member] |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income | (333) |  |  | (1,305) |
Other Expense [Member] | Accounting Standards Update 2014-09 [Member] |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income | $ 76 |  |  | 301 |
Accrued Liabilities [Member] |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income |  | $ 600 |  | 2,007 |
Other Current Liabilities [Member] |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income |  |  |  | 2,007 |
Deferred Tax Asset [Domain] |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income |  |  |  | (549) |
Retained earnings |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income |  |  |  | (1,458) |
Stockholders' Equity, Total [Member] |  |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income |  |  |  | $ (1,458) |

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- Definition Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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