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Investments | 6 Months Ended
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Oct. 01, 2016
Investments, Debt and Equity Securities [Abstract] |
Investments | Investments Investments consist of the following (in thousands):
| October 1, 2016 |  | April 2, 2016
Available-for-sale investment securities | $ | 25,201 |  |  | $ | 24,247 |
Non-marketable equity investments | 14,847 |  |  | 14,841 |
| $ | 40,048 |  |  | $ | 39,088 |
The following tables summarize the Company's available-for-sale investment securities, gross unrealized gains and losses and fair value, aggregated by investment category (in thousands):
| October 1, 2016
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
U.S. Treasury and government debt securities | $ | 650 |  |  | $ | — |  |  | $ | — |  |  | $ | 650 |
Residential mortgage-backed securities | 6,431 |  |  | 15 |  |  | (47 | ) |  | 6,399 |
State and political subdivision debt securities | 7,382 |  |  | 257 |  |  | (75 | ) |  | 7,564 |
Corporate debt securities | 1,157 |  |  | 6 |  |  | (3 | ) |  | 1,160 |
Marketable equity securities | 5,168 |  |  | 3,451 |  |  | (191 | ) |  | 8,428 |
Certificates of deposit | 1,000 |  |  | — |  |  | — |  |  | 1,000 |
| $ | 21,788 |  |  | $ | 3,729 |  |  | $ | (316 | ) |  | $ | 25,201 |
| April 2, 2016
| Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
U.S. Treasury and government debt securities | $ | 1,002 |  |  | $ | — |  |  | $ | (3 | ) |  | $ | 999 |
Residential mortgage-backed securities | 5,866 |  |  | 13 |  |  | (60 | ) |  | 5,819 |
State and political subdivision debt securities | 7,231 |  |  | 239 |  |  | (49 | ) |  | 7,421 |
Corporate debt securities | 1,166 |  |  | 4 |  |  | (6 | ) |  | 1,164 |
Marketable equity securities | 5,882 |  |  | 2,374 |  |  | (412 | ) |  | 7,844 |
Certificates of deposit | 1,000 |  |  | — |  |  | — |  |  | 1,000 |
| $ | 22,147 |  |  | $ | 2,630 |  |  | $ | (530 | ) |  | $ | 24,247 |
The following tables show the gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position (in thousands):
| October 1, 2016
| Less than 12 Months |  | 12 Months or Longer |  | Total
| Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
Residential mortgage-backed securities | $ | 2,999 |  |  | $ | (15 | ) |  | $ | 661 |  |  | $ | (32 | ) |  | $ | 3,660 |  |  | $ | (47 | )
State and political subdivision debt securities | 1,340 |  |  | (21 | ) |  | 1,966 |  |  | (54 | ) |  | 3,306 |  |  | (75 | )
Corporate debt securities | 246 |  |  | (3 | ) |  | — |  |  | — |  |  | 246 |  |  | (3 | )
Marketable equity securities | 1,030 |  |  | (113 | ) |  | 209 |  |  | (78 | ) |  | 1,239 |  |  | (191 | )
| $ | 5,615 |  |  | $ | (152 | ) |  | $ | 2,836 |  |  | $ | (164 | ) |  | $ | 8,451 |  |  | $ | (316 | )
| April 2, 2016
| Less than 12 Months |  | 12 Months or Longer |  | Total
| Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses |  | Fair Value |  | Unrealized Losses
U.S. Treasury and government debt securities | $ | — |  |  | $ | — |  |  | $ | 699 |  |  | $ | (3 | ) |  | $ | 699 |  |  | $ | (3 | )
Residential mortgage-backed securities | 3,436 |  |  | (27 | ) |  | 898 |  |  | (33 | ) |  | 4,334 |  |  | (60 | )
State and political subdivision debt securities | 1,865 |  |  | (29 | ) |  | 1,257 |  |  | (20 | ) |  | 3,122 |  |  | (49 | )
Corporate debt securities | 763 |  |  | (6 | ) |  | — |  |  | — |  |  | 763 |  |  | (6 | )
Marketable equity securities | 1,780 |  |  | (324 | ) |  | 152 |  |  | (88 | ) |  | 1,932 |  |  | (412 | )
| $ | 7,844 |  |  | $ | (386 | ) |  | $ | 3,006 |  |  | $ | (144 | ) |  | $ | 10,850 |  |  | $ | (530 | )
Based on the Company's ability and intent to hold the investments for a reasonable period of time sufficient for a forecasted recovery of fair value, the Company does not consider any investments to be other-than-temporarily impaired at October 1, 2016. As of October 1, 2016, the Company's investments in marketable equity securities consist of investments in common stock of industrial and other companies ($8.4 million of the total fair value and $191,000 of the total unrealized losses). As of April 2, 2016, the Company's investments in marketable equity securities consisted of investments in common stock of industrial and other companies ($7.7 million of the total fair value and $409,000 of the total unrealized losses) and bank trust, insurance and public utility companies ($100,000 of the total fair value and $3,000 of the total unrealized losses). The amortized cost and fair value of the Company's investments in debt securities, by contractual maturity, are shown in the table below (in thousands). Expected maturities differ from contractual maturities as borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
| October 1, 2016
| Amortized Cost |  | Fair Value
Due in less than one year | $ | 1,364 |  |  | $ | 1,370 |
Due after one year through five years | 3,907 |  |  | 3,906 |
Due after five years through ten years | 3,895 |  |  | 3,836 |
Due after ten years | 6,454 |  |  | 6,661 |
| $ | 15,620 |  |  | $ | 15,773 |
Realized gains and losses from the sale of securities are determined using the specific identification method. Gross gains realized on the sales of investment securities for the three and six months ended October 1, 2016 were approximately $208,000 and $661,000, respectively. Gross losses realized were approximately $108,000 and $257,000 for the three and six months ended October 1, 2016, respectively. Gross gains realized on the sales of investment securities for the three and six months ended September 26, 2015 were approximately $51,000 and $231,000, respectively. Gross losses realized were approximately $66,000 and $112,000 for the three and six months ended September 26, 2015.

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