Discontinued Operations - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Jan. 31, 2012 Facility	Nov. 30, 2011 Facility	Jun. 30, 2013 Facility
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets of discontinued operations	$ 0
Current assets of discontinued operations		15,000
Current liabilities of discontinued operations	$ 54,000	$ 886,000
Delta Correctional Facility
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
Dawson State Jail
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Housing capacity of terminated facility, in beds					2,216
Wilkinson County Correctional Facility
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Housing capacity of terminated facility, in beds					1,000