Earnings per Unit
 9 Months Ended
Sep. 25, 2016
Earnings Per Unit [Abstract]  
Earnings Per Unit
Earnings per Unit:
Net income per limited partner unit is calculated based on the following unit amounts:
 
Three months ended
 
Nine months ended
 
9/25/2016
 
9/27/2015
 
9/25/2016
 
9/27/2015
 
(In thousands,
except per unit amounts)
Basic weighted average units outstanding
55,948

 
55,770

 
55,922

 
55,721

Effect of dilutive units:
 
 
 
 
 
 
 
Deferred units
33

 
21

 
30

 
15

Performance units
—

 
—

 
43

 
9

Restricted units
253

 
365

 
266

 
271

Unit options
131

 
126

 
131

 
102

Phantom units
—

 
—

 
—

 
23

Diluted weighted average units outstanding
56,365

 
56,282

 
56,392

 
56,141

Net income per unit - basic
$
3.13

 
$
2.94

 
$
3.30

 
$
2.47

Net income per unit - diluted
$
3.10

 
$
2.92

 
$
3.27

 
$
2.46



The effect of out-of-money and/or antidilutive unit options on the three and nine months ended September 25, 2016 and September 27, 2015, respectively, had they not been out of the money or antidilutive, would have been immaterial in all periods presented.