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Stock Options, Other Stock Awards and Warrants (Tables)
 12 Months Ended
Dec. 28, 2014
Stock Options, Other Stock Awards and Warrants [Abstract]  
Schedule of restricted stock awards and restricted stock units
Restricted Stock Units

The Company on occasion will issue restricted stock or grant restricted stock units to certain key employees. These shares or units are nontransferable and subject to forfeiture for periods prescribed by the Company.  These awards are valued at the market value of the underlying common stock at the date of grant and are subsequently amortized over the periods during which the restrictions lapse, generally between three and five years. During 2014, 2013 and 2012, the Company recognized compensation expense, net of forfeitures, on these awards of $15,643, $8,732 and $2,328, respectively. At December 28, 2014, the amount of total unrecognized compensation cost related to restricted stock units is $34,146 and the weighted average period over which this will be expensed is 29 months.

In October 2012, as part of an Amended and Restated Employment Agreement, the Company's Chief Executive Officer was awarded 587 shares to be granted in two tranches across 2013 and 2014. As of May 2013, both tranches met the accounting definition for grant date and, as such, are being expensed from 2013 through 2017. Expenses related to 2014 and 2013 are included in the aforementioned recognized and unrecognized compensation costs related to restricted stock units. 119 shares of this award are considered granted in 2013 while the remaining 119 shares were granted in February 2014. These awards provide the recipient with the ability to earn shares of the Company's common stock based on the Company's achievement of four stated stock price hurdles and continued employment through December 31, 2017. At the completion of the service period, the recipient will receive one quarter of the award for each stock price hurdle achieved after April 24, 2013. The four stock price hurdles are $45, $52, $56 and $60 which must be met for a period of at least thirty days using the average closing price over such period. In August 2014, the Amended and Restated Employment Agreement was further amended to include additional requirements. Specifically, if the third and fourth stock price hurdles are achieved, the number of shares ultimately issued will be dependent on the average stock price for the thirty day period immediately prior to December 31, 2017. This amendment did not result in any incremental fair value to the award which is used to record compensation expense for the award.

The Company used a Monte Carlo simulation valuation model to determine the fair value of these awards. The following inputs were used in the simulation that resulted in an average grant date fair value for this award of $35.56:

  
Inputs
 
Grant date stock price
 
$
47.28
 
Stock price volatility
  
26.12
%
Risk-free interest rate
  
0.65
%
Dividend yield
  
3.38
%

Excluding the aforementioned award for 587 shares, information with respect to the remaining Restricted Stock Awards and Restricted Stock Units for 2014, 2013 and 2012 is as follows:

  
2014
  
2013
  
2012
 
       
Outstanding at beginning of year
  
702
   
296
   
232
 
Granted
  
281
   
451
   
92
 
Forfeited
  
(39
)
  
(44
)
  
(27
)
Vested
  
(7
)
  
(1
)
  
(1
)
Outstanding at end of year
  
937
   
702
   
296
 
             
Weighted average grant-date fair value:
            
Granted
 
$
52.06
   
45.16
   
36.01
 
Forfeited
 
$
44.44
   
40.40
   
40.80
 
Vested
 
$
41.19
   
33.62
   
32.90
 
Outstanding at end of year
 
$
45.74
   
43.10
   
39.53
 
Schedule of stock performance awards
Information with respect to Stock Performance Awards for 2014, 2013 and 2012 is as follows:

  
2014
  
2013
  
2012
 
       
Outstanding at beginning of year
  
943
   
1,019
   
1,627
 
Granted
  
322
   
358
   
695
 
Forfeited
  
(32
)
  
(101
)
  
(144
)
Cancelled
  
(578
)
  
(333
)
  
(682
)
Vested
  
-
   
-
   
(477
)
Outstanding at end of year
  
655
   
943
   
1,019
 
             
Weighted average grant-date fair value:
            
Granted
 
$
52.11
   
47.21
   
36.14
 
Forfeited
 
$
43.21
   
40.24
   
37.54
 
Cancelled
 
$
36.14
   
45.66
   
33.76
 
Vested
 
$
-
   
-
   
22.31
 
Outstanding at end of year
 
$
49.57
   
40.24
   
39.57
 
Schedule of total compensation expense related to stock options, restricted stock units and stock performance awards
Total compensation expense related to stock options, restricted stock units, including those awards made to non-employee members of its Board of Directors, and stock performance awards for the years ended December 28, 2014, December 29, 2013 and December 30, 2012 was $36,152, $21,272 and $19,434, respectively, and was recorded as follows:

  
2014
  
2013
  
2012
 
       
Cost of sales
 
$
395
   
152
   
146
 
Product development
  
3,874
   
1,767
   
1,854
 
Selling, distribution and administration
  
31,883
   
19,353
   
17,434
 
   
36,152
   
21,272
   
19,434
 
Income tax benefit
  
11,745
   
7,065
   
6,392
 
  
$
24,407
   
14,207
   
13,042
 
Schedule of stock option information
Stock Options

Information with respect to stock options for the three years ended December 28, 2014 is as follows:

  
2014
  
2013
  
2012
 
       
Outstanding at beginning of year
  
5,543
   
9,283
   
11,004
 
Granted
  
684
   
776
   
1,730
 
Exercised
  
(1,951
)
  
(4,377
)
  
(3,126
)
Expired or forfeited
  
(90
)
  
(139
)
  
(325
)
Outstanding at end of year
  
4,186
   
5,543
   
9,283
 
             
Exercisable at end of year
  
2,374
   
3,144
   
6,094
 
             
Weighted average exercise price:
            
Granted
 
$
52.11
   
47.21
   
36.14
 
Exercised
 
$
31.07
   
26.99
   
21.23
 
Expired or forfeited
 
$
39.85
   
39.59
   
35.19
 
Outstanding at end of year
 
$
41.68
   
36.63
   
31.25
 
Exercisable at end of year
 
$
38.90
   
33.22
   
27.84
 
Schedule of weighted average assumptions used to determine the fair value of option grants
The Company uses the Black-Scholes valuation model in determining the fair value of stock options. The expected life of the options used in this calculation is the period of time the options are expected to be outstanding and has been determined based on historical exercise experience. The weighted average fair value of options granted in fiscal 2014, 2013 and 2012 was $8.40, $6.94 and $6.29, respectively. The fair value of each option grant is estimated on the date of grant using the Black-Scholes option pricing model with the following weighted average assumptions used for grants in the fiscal years 2014, 2013 and 2012:

 
2014
 
2013
 
2012
Risk-free interest rate
1.42%
 
0.62%
 
0.69%
Expected dividend yield
3.30%
 
3.39%
 
3.99%
Expected volatility
26%
 
26%
 
31%
Expected option life
5 years
 
5 years
 
5 years