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Investments in Limited Partnerships and Marketable Securities (Tables)
3 Months Ended
Mar. 28, 2015
Marketable Securities and Equity-Method Affiliates [Abstract]  
Schedule of Available-for-sale Securities Reconciliation
The following is a summary of the Company's marketable securities, all of which are classified as available-for-sale:
 
March 28, 2015
 
Amortized Cost
 
Gross Unrealized Gains
 
Gross Unrealized Losses
 
Fair Value
 
(in thousands)
Mutual fund
$
4,650

 
$
16

 
$

 
$
4,666

Total
$
4,650

 
$
16

 
$

 
$
4,666