Segment Information (Reconciliation of Assets) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 6,038,948	$ 5,883,054
Reportable Segment
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	4,194,317	4,233,066
Las Vegas Locals
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	1,236,178	1,260,458
Downtown Las Vegas
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	129,687	131,140
Midwest and South
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	1,402,438	1,406,136
Atlantic City
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	1,426,014	1,435,332
Corporate
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	1,615,512	1,421,848
Other
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 229,119	$ 228,140