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Discontinued Operations - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | Jun. 30, 2013 | Dec. 31, 2012 | Jan. 31, 2012 Delta Correctional Facility Facility | Nov. 30, 2011 Delta Correctional Facility Facility
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Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Housing capacity of terminated facility, in beds |  |  |  | 1,172
Number of inmates being transferred from facility |  |  | 900 |
Discontinued operations, accounts payable and accrued liabilities | $ 0.1 | $ 0.4 |  |

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- Definition For the disposal group, including a component of the entity (discontinued operation), carrying value of obligations incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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- Details
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