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Note 4. Investment in Evitts Resort, LLC and Acquisition of Rocky Gap Lodge & Golf Resort (Detail) - Summary of Intangible Assets by Category (USD $) In Thousands, unless otherwise specified | 6 Months Ended
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Sep. 30, 2012
Amount Assigned | $ 627
Contractual Rights [Member] |
Useful Life (years) | 1 year 146 days
Amount Assigned | 179
Customer Contracts [Member] |
Useful Life (years) | 25 years
Amount Assigned | $ 448

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16265-109275 + Details
Name: | us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of acquisition cost of a business combination allocated to assets, excluding financial assets and goodwill, lacking physical substance. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsOtherThanGoodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant