Sale of Assets (Details) (USD $)	12 Months Ended									1 Months Ended				1 Months Ended		1 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Class A Membership Unit [Member]	Dec. 31, 2011 Class A Membership Unit [Member]	Dec. 31, 2010 Class A Membership Unit [Member]	Dec. 31, 2012 Class B Membership Unit [Member]	Dec. 31, 2011 Class B Membership Unit [Member]	Dec. 31, 2010 Class B Membership Unit [Member]	Apr. 19, 2007 Telos ID [Member]	Apr. 30, 2007 Telos ID [Member] Director Subclasses	Apr. 20, 2007 Telos ID [Member]	Apr. 11, 2007 Telos ID [Member]	Apr. 30, 2007 Telos ID [Member] Class A Membership Unit [Member] Director	Apr. 20, 2007 Telos ID [Member] Class A Membership Unit [Member]	Apr. 30, 2007 Telos ID [Member] Class B Membership Unit [Member] Director	Apr. 20, 2007 Telos ID [Member] Class B Membership Unit [Member]
Noncontrolling Interest [Line Items]
Net book value of assets contributed													$ 17,000
Percentage of membership interest owned before (in hundredths)										99.999%
Owned membership interest from private equity investors (in hundredths)										0.01%
Percentage of membership interest sold to investor (in hundredths)												39.999%
Cash consideration received on sale of membership interest												6,000,000
Profits	9,495,000	3,503,000	4,244,000	3,100,000	3,100,000	1,800,000	2,100,000	2,000,000	1,200,000
Recognized gain on sale of membership interests to the Investors											5,800,000
Percentage of ownership interest owned after transaction (in hundredths)														60.00%		40.00%
Number of members in board of director											5
Number of subclasses of membership units											2
Percentage of profit and loss allocated (in hundredths)															60.00%		40.00%
Number of directors entitled to appoint														3		2
Quarterly distribution to minority shareholder											450,000
Period for which quarterly distributions of 450000 made											18 months
Changes in non-controlling interest [Abstract]
Non-controlling interest, beginning of period	381,000	454,000	328,000
Net income	2,060,000	2,049,000	1,197,000
Distributions	(1,973,000)	(2,122,000)	(1,071,000)
Non-controlling interest, end of period	$ 468,000	$ 381,000	$ 454,000