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
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

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.

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

Name:	us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration