v2.4.0.6
Fair Value Measurements (Fair Value Balance Sheet Long-Term Debt Grouping) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Outstanding Face Amount
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument $ 2,939,409 $ 2,600,239
Estimated Fair Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 2,956,090 2,286,516
Fair Value, Measurements, Nonrecurring | Outstanding Face Amount
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 4,955,803 3,431,939
Fair Value, Measurements, Nonrecurring | Carrying Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 4,889,423 3,390,456
Fair Value, Measurements, Nonrecurring | Estimated Fair Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 4,989,243 3,062,901
Fair Value, Measurements, Nonrecurring | Level 3 | Outstanding Face Amount
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Merger earnout 9,800  
Fair Value, Measurements, Nonrecurring | Level 3 | Carrying Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Merger earnout 0  
Fair Value, Measurements, Nonrecurring | Level 3 | Estimated Fair Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Merger earnout 9,800  
Consolidated, Excluding Borgata
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 4,096,099  
Consolidated, Excluding Borgata | Outstanding Face Amount
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 4,144,303  
Consolidated, Excluding Borgata | Carrying Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 4,096,099  
Consolidated, Excluding Borgata | Estimated Fair Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 4,193,143  
Boyd | Carrying Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 2,891,208 2,580,648
Boyd | Bank Credit Facility | Bank Credit Facility | Fair Value, Measurements, Nonrecurring | Level 2 | Outstanding Face Amount
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 1,474,850 1,632,750
Boyd | Bank Credit Facility | Bank Credit Facility | Fair Value, Measurements, Nonrecurring | Level 2 | Carrying Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 1,466,635 1,621,715
Boyd | Bank Credit Facility | Bank Credit Facility | Fair Value, Measurements, Nonrecurring | Level 2 | Estimated Fair Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 1,508,516 1,388,630
Boyd | 9.125% Senior Notes Due 2018 | Senior Notes | Fair Value, Measurements, Nonrecurring | Level 1 | Outstanding Face Amount
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 500,000 500,000
Boyd | 9.125% Senior Notes Due 2018 | Senior Notes | Fair Value, Measurements, Nonrecurring | Level 1 | Carrying Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 492,680 491,444
Boyd | 9.125% Senior Notes Due 2018 | Senior Notes | Fair Value, Measurements, Nonrecurring | Level 1 | Estimated Fair Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 523,995 471,000
Boyd | 9.00% Senior Notes Due 2020 | Senior Notes | Fair Value, Measurements, Nonrecurring | Level 1 | Outstanding Face Amount
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 350,000  
Boyd | 9.00% Senior Notes Due 2020 | Senior Notes | Fair Value, Measurements, Nonrecurring | Level 1 | Carrying Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 350,000  
Boyd | 9.00% Senior Notes Due 2020 | Senior Notes | Fair Value, Measurements, Nonrecurring | Level 1 | Estimated Fair Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 347,158  
Boyd | 6.75% Senior Subordinated Notes Due 2014 | Senior Subordinated Notes | Fair Value, Measurements, Nonrecurring | Level 1 | Outstanding Face Amount
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 215,668 215,668
Boyd | 6.75% Senior Subordinated Notes Due 2014 | Senior Subordinated Notes | Fair Value, Measurements, Nonrecurring | Level 1 | Carrying Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 215,668 215,668
Boyd | 6.75% Senior Subordinated Notes Due 2014 | Senior Subordinated Notes | Fair Value, Measurements, Nonrecurring | Level 1 | Estimated Fair Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 216,460 208,120
Boyd | 7.125% Senior Subordinated Notes Due 2016 | Senior Subordinated Notes | Fair Value, Measurements, Nonrecurring | Level 1 | Outstanding Face Amount
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 240,750 240,750
Boyd | 7.125% Senior Subordinated Notes Due 2016 | Senior Subordinated Notes | Fair Value, Measurements, Nonrecurring | Level 1 | Carrying Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 240,750 240,750
Boyd | 7.125% Senior Subordinated Notes Due 2016 | Senior Subordinated Notes | Fair Value, Measurements, Nonrecurring | Level 1 | Estimated Fair Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 236,537 208,249
Boyd | Other | Fixed Rate Debt | Fair Value, Measurements, Nonrecurring | Level 3 | Outstanding Face Amount
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 158,141 11,071
Boyd | Other | Fixed Rate Debt | Fair Value, Measurements, Nonrecurring | Level 3 | Carrying Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 125,475 11,071
Boyd | Other | Fixed Rate Debt | Fair Value, Measurements, Nonrecurring | Level 3 | Estimated Fair Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 123,424 10,517
Peninsula
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 1,204,891  
Peninsula | Outstanding Face Amount
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 1,204,894  
Peninsula | Carrying Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 1,204,891  
Peninsula | Estimated Fair Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 1,237,053  
Peninsula | Bank Credit Facility
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 854,400  
Peninsula | Other
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 491  
Peninsula | Other | Fair Value, Measurements, Nonrecurring | Level 3 | Outstanding Face Amount
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 494  
Peninsula | Other | Fair Value, Measurements, Nonrecurring | Level 3 | Carrying Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 491  
Peninsula | Other | Fair Value, Measurements, Nonrecurring | Level 3 | Estimated Fair Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 494  
Peninsula | Bank Credit Facility | Bank Credit Facility | Fair Value, Measurements, Nonrecurring | Level 2 | Outstanding Face Amount
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 854,400  
Peninsula | Bank Credit Facility | Bank Credit Facility | Fair Value, Measurements, Nonrecurring | Level 2 | Carrying Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 854,400  
Peninsula | Bank Credit Facility | Bank Credit Facility | Fair Value, Measurements, Nonrecurring | Level 2 | Estimated Fair Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 868,838  
Peninsula | 8.375% Senior Notes due 2018 | Senior Notes
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 350,000  
Peninsula | 8.375% Senior Notes due 2018 | Senior Notes | Fair Value, Measurements, Nonrecurring | Level 1 | Outstanding Face Amount
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 350,000  
Peninsula | 8.375% Senior Notes due 2018 | Senior Notes | Fair Value, Measurements, Nonrecurring | Level 1 | Carrying Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 350,000  
Peninsula | 8.375% Senior Notes due 2018 | Senior Notes | Fair Value, Measurements, Nonrecurring | Level 1 | Estimated Fair Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 367,721  
Borgata
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 793,324 809,808
Borgata | Outstanding Face Amount
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 811,500 831,700
Borgata | Carrying Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 793,324 809,808
Borgata | Estimated Fair Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 796,100 776,385
Borgata | Bank Credit Facility
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term debt 20,000 40,200
Borgata | Bank Credit Facility | Bank Credit Facility | Fair Value, Measurements, Nonrecurring | Level 2 | Outstanding Face Amount
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 20,000 40,200
Borgata | Bank Credit Facility | Bank Credit Facility | Fair Value, Measurements, Nonrecurring | Level 2 | Carrying Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 20,000 40,200
Borgata | Bank Credit Facility | Bank Credit Facility | Fair Value, Measurements, Nonrecurring | Level 2 | Estimated Fair Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 20,000 40,200
Borgata | 9.50% Senior Secured Notes Due 2015 | Secured Debt | Fair Value, Measurements, Nonrecurring | Level 1 | Outstanding Face Amount
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 398,000 398,000
Borgata | 9.50% Senior Secured Notes Due 2015 | Secured Debt | Fair Value, Measurements, Nonrecurring | Level 1 | Carrying Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 389,547 387,049
Borgata | 9.50% Senior Secured Notes Due 2015 | Secured Debt | Fair Value, Measurements, Nonrecurring | Level 1 | Estimated Fair Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 402,275 378,100
Borgata | 9.875% Senior Secured Notes Due 2018 | Secured Debt | Fair Value, Measurements, Nonrecurring | Level 1 | Outstanding Face Amount
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 393,500 393,500
Borgata | 9.875% Senior Secured Notes Due 2018 | Secured Debt | Fair Value, Measurements, Nonrecurring | Level 1 | Carrying Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument 383,777 382,559
Borgata | 9.875% Senior Secured Notes Due 2018 | Secured Debt | Fair Value, Measurements, Nonrecurring | Level 1 | Estimated Fair Value
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument $ 373,825 $ 358,085