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Fair Value Measurements (Details 1) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2016
Jan. 02, 2016
Dec. 31, 2016
Jan. 02, 2016
Changes in Level 3 instruments measured at fair value on a recurring basis        
Balance as of beginning of period $ 10,160 $ 10,413 $ 9,977 $ 10,312
Total realized and unrealized gains (losses) included in other comprehensive income 67 (302) 250 (201)
Balance as of end of period $ 10,227 $ 10,111 $ 10,227 $ 10,111