Noncontrolling Interest (Narrative) (Details)	Jun. 30, 2012	Dec. 31, 2011
Borgata
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners	50.00%	50.00%
LVE
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners	100.00%	100.00%

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

No definition available.

Name:	us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant