Marketable Securities | Note 2. Marketable Securities The Company’s portfolio of available-for-sale marketable securities consists of the following: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (In thousands) September 27, 2015 U.S. government and agency securities $ 75,175 $ 222 $ (8 ) $ 75,389 Corporate debt obligations 89,321 89 (143 ) 89,267 Mortgage-backed securities 22,683 151 (42 ) 22,792 Municipal bonds 14,238 52 (3 ) 14,287 Other debt securities 4,078 6 — 4,084 $ 205,495 $ 520 $ (196 ) $ 205,819 March 29, 2015 U.S. government and agency securities $ 54,279 $ 173 $ (12 ) $ 54,440 Corporate debt obligations 99,117 257 (51 ) 99,323 Mortgage-backed securities 26,676 182 (36 ) 26,822 Municipal bonds 16,647 76 (2 ) 16,721 Other debt securities 3,860 8 — 3,868 $ 200,579 $ 696 $ (101 ) $ 201,174 The amortized cost and estimated fair value of debt securities as of September 27, 2015, by contractual maturity, are presented below. Expected maturities will differ from contractual maturities because the issuers of securities may have the right to repay obligations without prepayment penalties. Certain debt instruments, although possessing a contractual maturity greater than one year, are classified as short-term marketable securities based on their ability to be traded on active markets and availability for current operations. Amortized Cost Estimated Fair Value (In thousands) Due in one year or less $ 47,304 $ 47,329 Due after one year through three years 125,140 125,208 Due after three years through five years 19,496 19,631 Due after five years 13,555 13,651 $ 205,495 $ 205,819 The following table presents the Company’s marketable securities with unrealized losses by investment category and length of time that individual securities have been in a continuous unrealized loss position as of September 27, 2015 and March 29, 2015. Less Than 12 Months 12 Months or Greater Total Description of Securities Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses (In thousands) September 27, 2015 U.S. government and agency securities $ 17,998 $ (8 ) $ — $ — $ 17,998 $ (8 ) Corporate debt obligations 48,435 (143 ) — — 48,435 (143 ) Mortgage-backed securities 6,944 (32 ) 1,730 (10 ) 8,674 (42 ) Municipal bonds 1,408 (3 ) — — 1,408 (3 ) $ 74,785 $ (186 ) $ 1,730 $ (10 ) $ 76,515 $ (196 ) March 29, 2015 U.S. government and agency securities $ 16,607 $ (12 ) $ — $ — $ 16,607 $ (12 ) Corporate debt obligations 28,421 (51 ) — — 28,421 (51 ) Mortgage-backed securities 4,174 (8 ) 4,581 (28 ) 8,755 (36 ) Municipal bonds 921 (2 ) — — 921 (2 ) $ 50,123 $ (73 ) $ 4,581 $ (28 ) $ 54,704 $ (101 ) As of September 27, 2015 and March 29, 2015, the fair value of certain of the Company’s available-for-sale securities was less than their cost basis. Management reviewed various factors in determining whether to recognize an impairment charge related to these unrealized losses, including the current financial and credit market environment, the financial condition and near-term prospects of the issuer of the security, the magnitude of the unrealized loss compared to the cost of the investment, the length of time the investment had been in a loss position and the Company’s intent and ability to hold the investment for a period of time sufficient to allow for any anticipated recovery of market value. As of September 27, 2015 and March 29, 2015, the Company determined that the unrealized losses were temporary in nature and recorded them as a component of accumulated other comprehensive income. |