Long-Term Debt (Boyd Bank Credit Facility Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Line of Credit Facility [Line Items]
Loss on early extinguishments of debt	$ 419	$ 30,962	$ 846	$ 31,470
Parent
Line of Credit Facility [Line Items]
Loss on early extinguishments of debt	0	30,008	0	30,008
Parent \| Bank Credit Facility
Line of Credit Facility [Line Items]
Amount outstanding	903,275		903,275		$ 1,209,725
Remaining borrowing capacity	592,900		592,900
Parent \| Bank Credit Facility \| Initial Term Loan
Line of Credit Facility [Line Items]
Amount outstanding	177,025		177,025		183,275
Parent \| Bank Credit Facility \| Incremental Term Loan [Member]
Line of Credit Facility [Line Items]
Amount outstanding	726,250		726,250		730,750
Parent \| Letter of Credit
Line of Credit Facility [Line Items]
Amount outstanding	7,100		7,100
Subsidiary, Peninsula Gaming [Member] \| Bank Credit Facility
Line of Credit Facility [Line Items]
Loss on early extinguishments of debt	400	$ 1,000	800	$ 1,500
Amount outstanding	610,525		610,525		$ 662,750
Remaining borrowing capacity	31,100		31,100
Subsidiary, Peninsula Gaming [Member] \| Letter of Credit
Line of Credit Facility [Line Items]
Amount outstanding	$ 5,000		$ 5,000