<?xml version="1.0" encoding="UTF-8"?>
<informationTable
	xsi:schemaLocation="http://www.sec.gov/edgar/document/thirteenf/informationtable eis_13FDocument.xsd"
	xmlns="http://www.sec.gov/edgar/document/thirteenf/informationtable"
	xmlns:n1="http://www.sec.gov/edgar/document/thirteenf/informationtable"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
	<infoTable>
		<nameOfIssuer>AMERICAN INTERNATIONAL GROUP</nameOfIssuer>
		<titleOfClass>COM NEW</titleOfClass>
		<cusip>026874784</cusip>
		<value>5188</value>
		<shrsOrPrnAmt>
			<sshPrnamt>91300</sshPrnamt>
			<sshPrnamtType>SH</sshPrnamtType>
		</shrsOrPrnAmt>
		<investmentDiscretion>DFND</investmentDiscretion>
		<votingAuthority>
			<Sole>0</Sole>
			<Shared>91300</Shared>
			<None>0</None>
		</votingAuthority>
	</infoTable>
	<infoTable>
		<nameOfIssuer>CITIGROUP INC</nameOfIssuer>
		<titleOfClass>COM NEW</titleOfClass>
		<cusip>172967424</cusip>
		<value>11584</value>
		<shrsOrPrnAmt>
			<sshPrnamt>233500</sshPrnamt>
			<sshPrnamtType>SH</sshPrnamtType>
		</shrsOrPrnAmt>
		<investmentDiscretion>DFND</investmentDiscretion>
		<votingAuthority>
			<Sole>0</Sole>
			<Shared>233500</Shared>
			<None>0</None>
		</votingAuthority>
	</infoTable>
	<infoTable>
		<nameOfIssuer>GULFPORT ENERGY CORP</nameOfIssuer>
		<titleOfClass>COM NEW</titleOfClass>
		<cusip>402635304</cusip>
		<value>630</value>
		<shrsOrPrnAmt>
			<sshPrnamt>21242</sshPrnamt>
			<sshPrnamtType>SH</sshPrnamtType>
		</shrsOrPrnAmt>
		<investmentDiscretion>DFND</investmentDiscretion>
		<votingAuthority>
			<Sole>0</Sole>
			<Shared>21242</Shared>
			<None>0</None>
		</votingAuthority>
	</infoTable>
	<infoTable>
		<nameOfIssuer>INTERACTIVE BROKERS GRO-CL A</nameOfIssuer>
		<titleOfClass>COM</titleOfClass>
		<cusip>45841N107</cusip>
		<value>19099</value>
		<shrsOrPrnAmt>
			<sshPrnamt>483890</sshPrnamt>
			<sshPrnamtType>SH</sshPrnamtType>
		</shrsOrPrnAmt>
		<investmentDiscretion>DFND</investmentDiscretion>
		<votingAuthority>
			<Sole>0</Sole>
			<Shared>483890</Shared>
			<None>0</None>
		</votingAuthority>
	</infoTable>
	<infoTable>
		<nameOfIssuer>MEMORIAL RESOURCE DEVELOPMEN</nameOfIssuer>
		<titleOfClass>COM</titleOfClass>
		<cusip>58605Q109</cusip>
		<value>4186</value>
		<shrsOrPrnAmt>
			<sshPrnamt>238103</sshPrnamt>
			<sshPrnamtType>SH</sshPrnamtType>
		</shrsOrPrnAmt>
		<investmentDiscretion>DFND</investmentDiscretion>
		<votingAuthority>
			<Sole>0</Sole>
			<Shared>238103</Shared>
			<None>0</None>
		</votingAuthority>
	</infoTable>
	<infoTable>
		<nameOfIssuer>MYLAN NV</nameOfIssuer>
		<titleOfClass>SHS EURO</titleOfClass>
		<cusip>N59465109</cusip>
		<value>8193</value>
		<shrsOrPrnAmt>
			<sshPrnamt>203500</sshPrnamt>
			<sshPrnamtType>SH</sshPrnamtType>
		</shrsOrPrnAmt>
		<investmentDiscretion>DFND</investmentDiscretion>
		<votingAuthority>
			<Sole>0</Sole>
			<Shared>203500</Shared>
			<None>0</None>
		</votingAuthority>
	</infoTable>
	<infoTable>
		<nameOfIssuer>PDC ENERGY INC</nameOfIssuer>
		<titleOfClass>COM</titleOfClass>
		<cusip>69327R101</cusip>
		<value>2467</value>
		<shrsOrPrnAmt>
			<sshPrnamt>46535</sshPrnamt>
			<sshPrnamtType>SH</sshPrnamtType>
		</shrsOrPrnAmt>
		<investmentDiscretion>DFND</investmentDiscretion>
		<votingAuthority>
			<Sole>0</Sole>
			<Shared>46535</Shared>
			<None>0</None>
		</votingAuthority>
	</infoTable>
	<infoTable>
		<nameOfIssuer>PAYPAL HOLDINGS INC</nameOfIssuer>
		<titleOfClass>COM</titleOfClass>
		<cusip>70450Y103</cusip>
		<value>5845</value>
		<shrsOrPrnAmt>
			<sshPrnamt>188300</sshPrnamt>
			<sshPrnamtType>SH</sshPrnamtType>
		</shrsOrPrnAmt>
		<investmentDiscretion>DFND</investmentDiscretion>
		<votingAuthority>
			<Sole>0</Sole>
			<Shared>188300</Shared>
			<None>0</None>
		</votingAuthority>
	</infoTable>
	<infoTable>
		<nameOfIssuer>TWENTY-FIRST CENTURY FOX - B</nameOfIssuer>
		<titleOfClass>CL B</titleOfClass>
		<cusip>90130A200</cusip>
		<value>6334</value>
		<shrsOrPrnAmt>
			<sshPrnamt>234000</sshPrnamt>
			<sshPrnamtType>SH</sshPrnamtType>
		</shrsOrPrnAmt>
		<investmentDiscretion>DFND</investmentDiscretion>
		<votingAuthority>
			<Sole>0</Sole>
			<Shared>234000</Shared>
			<None>0</None>
		</votingAuthority>
	</infoTable>
</informationTable>
