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Component: (Network and Table)
Network
166 - Disclosure - Employee Benefit Plans - Summary of Change in Benefit Obligation (Detail)
(http://www.bbgi.com/taxonomy/role/DisclosureEmployeeBenefitPlansSummaryOfChangeInBenefitObligation)
TableDefined Contribution Plan [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001099160 (http://www.sec.gov/CIK)
Defined Contribution Plan Disclosure [Line Items]Period [Axis]
2016-01-01 - 2016-12-31
Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]
Pension Plan [Member]Supplemental Employee Retirement Plan [Member]Postretirement Benefits [Member]
Change in Projected Benefit Obligation
 
 
 
Benefit obligation at beginning of year
   
Service cost
  
8,169  
Interest cost
530,839  
51,696  
11,097  
Plan participants' contributions
  
1,939  
Actuarial (gain) loss
(965,046) 
(415,416) 
(103,396) 
Business combinations
88,705,097  
9,154,118  
1,859,010  
Benefits paid
(409,084) 
(38,550) 
(20,396) 
Benefit obligation at end of year
87,861,806  
 
8,751,848  
 
1,756,423