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Investment in Affiliate - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013 Y	Dec. 31, 2012	Dec. 31, 2011
Investments in and Advances to Affiliates [Line Items]
Ownership interest in APM	50.00%
Duration of prison management contract with an agency of the United Kingdom government	25
Working capital loan to APM	$ 4,800,000
Equity earnings (losses) of joint venture	78,000	323,000	(134,000)
Other Assets
Investments in and Advances to Affiliates [Line Items]
Equity in net deficit of Affiliate	$ 600,000	$ 600,000

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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