Long-Term Debt (Schedule of Long-term Debt) (Details) (USD $)	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013 Senior Notes 9.125% Senior Notes Due 2018	Jun. 30, 2013 Senior Notes 9.00% Senior Notes Due 2020	Jun. 30, 2014 Parent	Dec. 31, 2013 Parent	Jun. 30, 2014 Parent Bank Credit Facility	Dec. 31, 2013 Parent Bank Credit Facility	Jun. 30, 2014 Parent Bank Credit Facility Bank Credit Facility [Member]	Dec. 31, 2013 Parent Bank Credit Facility Bank Credit Facility [Member]	Jun. 30, 2014 Parent Senior Notes 9.125% Senior Notes Due 2018	Dec. 31, 2013 Parent Senior Notes 9.125% Senior Notes Due 2018	Nov. 10, 2010 Parent Senior Notes 9.125% Senior Notes Due 2018	Jun. 30, 2014 Parent Senior Notes 9.00% Senior Notes Due 2020	Dec. 31, 2013 Parent Senior Notes 9.00% Senior Notes Due 2020	Jun. 08, 2012 Parent Senior Notes 9.00% Senior Notes Due 2020	Jun. 30, 2014 Parent Other Holdco Note [Member]	Dec. 31, 2013 Parent Other Holdco Note [Member]	Jun. 30, 2014 Subsidiary, Peninsula Gaming [Member]	Dec. 31, 2013 Subsidiary, Peninsula Gaming [Member]	Jun. 30, 2014 Subsidiary, Peninsula Gaming [Member] Bank Credit Facility	Jun. 30, 2014 Subsidiary, Peninsula Gaming [Member] Bank Credit Facility Bank Credit Facility [Member]	Dec. 31, 2013 Subsidiary, Peninsula Gaming [Member] Bank Credit Facility Bank Credit Facility [Member]	Jun. 30, 2014 Subsidiary, Peninsula Gaming [Member] Senior Notes Peninsula Senior Notes due 2018 [Member]	Dec. 31, 2013 Subsidiary, Peninsula Gaming [Member] Senior Notes Peninsula Senior Notes due 2018 [Member]	Aug. 16, 2012 Subsidiary, Peninsula Gaming [Member] Senior Notes Peninsula Senior Notes due 2018 [Member]	Jun. 30, 2014 Subsidiary, Peninsula Gaming [Member] Other	Dec. 31, 2013 Subsidiary, Peninsula Gaming [Member] Other	Jun. 30, 2014 Consolidated, Excluding Borgata [Member]	Dec. 31, 2013 Consolidated, Excluding Borgata [Member]	Jun. 30, 2014 Subsidiary, Borgata	Dec. 31, 2013 Subsidiary, Borgata	Jun. 30, 2014 Subsidiary, Borgata Bank Credit Facility	Jun. 30, 2014 Subsidiary, Borgata Bank Credit Facility Bank Credit Facility [Member]	Dec. 31, 2013 Subsidiary, Borgata Bank Credit Facility Bank Credit Facility [Member]	Jun. 30, 2014 Subsidiary, Borgata Secured Debt [Member] Term Loan [Member]	Dec. 31, 2013 Subsidiary, Borgata Secured Debt [Member] Term Loan [Member]	Jun. 30, 2014 Subsidiary, Borgata Senior Secured Notes Due 2018 [Member] Senior Secured Notes	Jun. 30, 2014 Subsidiary, Borgata Term Loan [Member]	Dec. 31, 2013 Subsidiary, Borgata Term Loan [Member]	Jun. 30, 2014 Subsidiary, Borgata Senior Secured Notes Senior Secured Notes Due 2018 [Member]	Dec. 31, 2013 Subsidiary, Borgata Senior Secured Notes Senior Secured Notes Due 2018 [Member]
Debt Instrument [Line Items]
Interest rate at period end									3.665%	3.66%							6.00%	6.00%				4.25%	4.20%											4.12%	3.86%
Maximum borrowing capacity																					$ 875,000,000
Amount outstanding							1,404,590,000	1,463,492,000													768,200,000												33,100,000
Remaining borrowing capacity							292,300,000														27,200,000												23,700,000
Interest added to principal	4,300,000
Long-term Debt, Gross					2,405,820,000	2,460,755,000				1,467,725,000		500,000,000			350,000,000			143,030,000	1,118,171,000	1,152,162,000			802,150,000		350,000,000			12,000	3,523,991,000	3,612,917,000	804,700,000	813,400,000			39,900,000		380,000,000					393,500,000
Unamortized discount	(23,902,000)	(27,181,000)			(18,889,000)	(21,604,000)			(3,910,000)	(4,233,000)	0	0		0	0		(14,979,000)	(17,371,000)	0	0		0	0	0	0		0	0	(18,889,000)	(21,604,000)	(5,013,000)	(5,577,000)		0	0				(3,359,000)	(3,766,000)	(1,654,000)	(1,811,000)
Unamortized origination fees	(11,456,000)	(12,645,000)			(5,464,000)	(6,082,000)			0	0	(5,464,000)	(6,082,000)		0	0		0	0	0	0		0	0	0	0		0	0	(5,464,000)	(6,082,000)	(5,992,000)	(6,563,000)		0	0				0	0	(5,992,000)	(6,563,000)
Long-term debt, net					2,381,467,000	2,433,069,000				1,463,492,000		493,918,000			350,000,000			125,659,000	1,118,171,000	1,152,162,000			802,150,000		350,000,000			12,000	3,499,638,000	3,585,231,000	793,695,000	801,260,000			39,900,000		376,234,000					385,126,000
Debt Instrument, Interest Rate, Effective Percentage																																				6.75%	6.75%
Debt Instrument, Interest Rate, Stated Percentage			9.125%	9.00%							9.13%		9.13%	9.00%		9.00%								8.38%		8.38%												9.88%				9.88%
Current maturities of long-term debt	31,496,000	33,559,000			21,500,000	21,500,000
Long-term debt, gross, excluding current maturities	4,297,195,000	4,392,758,000
Long-term debt, net of current maturities	$ 4,261,837,000	$ 4,352,932,000			$ 2,227,625,000	$ 2,285,910,000