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Asset Acquisitions (Assets Acquired and Liabilities Assumed) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Nov. 20, 2012 Peninsula Gaming | Dec. 31, 2011 IP Casino Resort Spa | Oct. 04, 2011 IP Casino Resort Spa
--- | --- | --- | --- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  |  |  | $ 2,173
Accounts receivable, net |  |  |  |  |  |  | 1,230
Inventories |  |  |  |  |  |  | 1,579
Prepaid expenses and other current assets |  |  |  |  |  |  | 6,638
Current assets |  |  |  |  | 48,610 |  | 11,620
Property and equipment, net |  |  |  |  | 430,093 |  | 264,703
Intangible assets |  |  |  |  | 577,501 |  | 28,600
Other assets |  |  |  |  | 49,339 |  |
Total acquired assets |  |  |  |  | 1,105,543 |  | 304,923
Accounts payable |  |  |  |  |  |  | 3,018
Accrued liabilities |  |  |  |  |  |  | 14,182
Current liabilities |  |  |  |  | 67,396 |  | 17,200
Other liabilities |  |  |  |  | 42,363 |  | 2,512
Total liabilities assumed |  |  |  |  | 109,759 |  | 19,712
Net identifiable assets |  |  |  |  | 995,784 | 285,211 | 285,211
Goodwill, net | 694,929 | 213,576 | 213,576 | 213,576 | 481,353 |  |
Net assets acquired |  |  |  |  | $ 1,477,137 |  |

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