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Basis of Presentation - Fair Value (Details 2) - USD ($) $ in Thousands	Dec. 31, 2015	Jun. 30, 2015
Property and equipment
Net value of turnkey security screening program assets at Mexico	$ 16,000
Level 3
Fair value of financial instruments
Fair value of assets	0	$ 0
Fair value of liabilities	0	0
Non-recurring
Fair value of financial instruments
Fair value of assets	0	0
Fair value of liabilities	0	0
Recurring
Fair value of financial instruments
Insurance company contracts	19,890	20,100
Interest rate contract	16	(41)
Total	20,343	22,500
Liabilities - Contingent payment obligations	11,752	17,175
Recurring | Equity securities
Fair value of financial instruments
Investments	437	2,441
Recurring | Level 1
Fair value of financial instruments
Total	182	291
Recurring | Level 1 | Equity securities
Fair value of financial instruments
Investments	182	291
Recurring | Level 2
Fair value of financial instruments
Insurance company contracts	19,890	20,100
Interest rate contract	16	(41)
Total	20,161	22,209
Recurring | Level 2 | Equity securities
Fair value of financial instruments
Investments	255	2,150
Recurring | Level 3
Fair value of financial instruments
Liabilities - Contingent payment obligations	$ 11,752	$ 17,175

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