Goodwill and Intangible Assets (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Summary of the identifiable intangible assets subject for amortization
Gross Carrying Amount	$ 16,841	$ 16,611
Impairment Charges
Accumulated Amortization	15,647	14,532
Net Carrying Amount	1,194	2,079
Non-compete agreements [Member]
Summary of the identifiable intangible assets subject for amortization
Gross Carrying Amount	3,860	3,860
Impairment Charges
Accumulated Amortization	3,434	3,149
Net Carrying Amount	426	711
Customer relationships [Member]
Summary of the identifiable intangible assets subject for amortization
Gross Carrying Amount	10,378	10,378
Impairment Charges
Accumulated Amortization	10,065	9,463
Net Carrying Amount	313	915
Asset purchase agreement [Member]
Summary of the identifiable intangible assets subject for amortization
Gross Carrying Amount	1,400	1,400
Impairment Charges
Accumulated Amortization	1,400	1,400
Net Carrying Amount
Trade name and trademark [Member]
Summary of the identifiable intangible assets subject for amortization
Gross Carrying Amount	600	600
Impairment Charges
Accumulated Amortization	554	481
Net Carrying Amount	46	119
Capitalized product development costs [Member]
Summary of the identifiable intangible assets subject for amortization
Gross Carrying Amount	603	373
Impairment Charges
Accumulated Amortization	194	39
Net Carrying Amount	$ 409	$ 334