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Employee Benefit Plans - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended
Dec. 28, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Non Employee Directors [Member]
Oct. 28, 2013
Restricted Stock [Member]
Non Employee Directors [Member]
Dec. 31, 2013
Stock Compensation Plans [Member]
Dec. 31, 2012
Stock Compensation Plans [Member]
Dec. 31, 2011
Stock Compensation Plans [Member]
Dec. 31, 2013
Stock Compensation Plans [Member]
2007 Stock Plan [Member]
Dec. 31, 2013
Stock Compensation Plans [Member]
2011 Stock Plan [Member]
Dec. 31, 2013
Stock Compensation Plans [Member]
Maximum [Member]
Dec. 31, 2013
Stock Compensation Plans [Member]
Minimum [Member]
Dec. 31, 2013
Health Insurance Plan [Member]
Dec. 31, 2012
Health Insurance Plan [Member]
Dec. 31, 2011
Health Insurance Plan [Member]
Dec. 31, 2013
Retirement Savings Plan [Member]
Dec. 31, 2012
Retirement Savings Plan [Member]
Dec. 31, 2011
Retirement Savings Plan [Member]
Dec. 31, 2013
Annual Incentive Plan [Member]
Performance
Dec. 31, 2012
Annual Incentive Plan [Member]
Dec. 31, 2011
Annual Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                            
Minimum service period required                           1 month     1 year          
Employee matching contribution                                 100.00% 100.00% 100.00%      
Employee matching contribution                                 50.00% 50.00% 50.00%      
Matching contribution of gross income                                 3.00% 3.00% 3.00%      
Matching contribution of gross income                                 2.00% 2.00% 2.00%      
Expense of employee related plan   $ 39,868 $ 33,492 $ 25,679                   $ 2,724 $ 1,907 $ 1,432 $ 416 $ 367 $ 271      
Number of performance metrics                                       5    
Bonuses charged to operating expenses                                       597 545 660
Common stock reserved for issuance pursuant to grants             1,987,412                              
Fair value of grants   100.00%         100.00%                              
Option vested                   20.00%                        
Vested option granted under the plan on the anniversary date of the grant                   20.00% 20.00%                      
Vesting period (in years)   5 years 5 years             4 years 5 years                      
Option grants during the period   127,000 310,000           0                          
Exercise period of option             10 years         10 years 9 years                  
Shares available for grant   946,000               447,790 498,128                      
Stock-based compensation expense             702 542 191                          
Unrecognized stock-based compensation expense             2,950                              
Period of recognition of stock-based compensation expense             3 years 9 months 18 days                              
Income tax benefit, Total             258 211 74                          
Weighted-average remaining contractual life, options   5 years 7 months 6 days         5 years 7 months 6 days                              
Total intrinsic value of options exercised   2,448 0                                      
Non-employee directors shares of restricted common stock   869       1,200                                
Equity restricted awards compensation for annual service to each of non-employee directors           4,484,000                                
Minimum Income tax obligations Forgone by Directors 40.00%                                          
Restricted stock awards vesting period 5 days                                          
Incremental director compensation expense         $ 1,200