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Other Income (Expense), Net
 12 Months Ended
Dec. 31, 2016
Other Income and Expenses [Abstract]  
Other Income (Expense), Net
Other Income (Expense), Net
Other income (expense), net consists of the following:
 
 
YEAR ENDED
DECEMBER 31,
(in thousands)
2016
 
2015
 
2014
Interest and amortization expense
$
(2,537
)
 
$
(2,493
)
 
$
(628
)
Sale of New Jersey state tax benefit
—

 
2,898

 
2,288

Investment and other income, net
543

 
457

 
179

 
$
(1,994
)
 
$
862

 
$
1,839