Goodwill and Intangible Assets (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended			12 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 20, 2012 Usach	Dec. 31, 2013 MMS	Dec. 31, 2012 MMS	Dec. 31, 2013 MMS Usach	Dec. 31, 2013 ATA
Goodwill [Line Items]
Goodwill	$ 9,864	$ 8,497	$ 8,657	$ 4,848	$ 8,497	$ 8,700	$ 5,016
Impairment charge	$ 3,809			$ 3,809		$ 3,800