Subsequent Events - Additional Information (Detail) - Restricted Stock Units (RSUs) [Member] - shares		6 Months Ended
Jul. 01, 2016	Jun. 30, 2016
Subsequent Event [Line Items]
RSU vesting date		Mar. 16, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award		Each recipient entered into an individual restricted stock unit award agreement with the following terms (i) the recipient is entitled to receive one share of Class A common stock for each RSU upon vesting, and (ii) the RSUs will vest on March 16, 2020, provided that the recipient is still an employee or director of our Company on such date.
Subsequent Event [Member] \| Long-Term Incentive Plan 2009 [Member]
Subsequent Event [Line Items]
Restricted stock units granted	348,841

Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award

Each recipient entered into an individual restricted stock unit award agreement with the following terms (i) the recipient is entitled to receive one share of Class A common stock for each RSU upon vesting, and (ii) the RSUs will vest on March 16, 2020, provided that the recipient is still an employee or director of our Company on such date.