Accrued Liabilities - Other (Components Of Other Accrued Liabilities) (Details) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Accrued Liabilities - Other [Abstract]
Professional fees	$ 2,602	$ 2,178
Customer deposits	2,393	2,398
Revenue share	1,733	1,043
Contingent consideration (Note 8)	1,500
Sales taxes	1,145	1,102
Software licenses	901	1,262
Contra-revenue	569
State DMV transaction fees	524
Computer equipment	374	1,693
Other	5,539	2,835
Total accrued liabilities - other	$ 17,280	$ 12,511