Rendering

Component: (Network and Table)
Network
171 - Disclosure - Employee Benefit Plans - Summary of Weighted-Average Assumptions for Disclosure (Detail)
(http://www.bbgi.com/taxonomy/role/DisclosureEmployeeBenefitPlansSummaryOfWeightedAverageAssumptionsForDisclosure)
TableDefined Contribution Plan [Table]
Slicers (applies to each fact value in each table cell)
Defined Contribution Plan Disclosure [Line Items]Period [Axis]
2016-12-31
Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]
Pension Plan [Member]Supplemental Employee Retirement Plan [Member]Postretirement Benefits [Member]
Weighted-average assumptions for Disclosure
 
 
 
Discount rate
3.62%  
3.80%  
4.00%  
Rate of compensation increase
0.00%  
0.00%  
0.00%