Goodwill and Intangible Asset (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Goodwill and Intangible Asset [Abstract]
Goodwill	$ 14,916,000	$ 15,058,000
Goodwill allocation adjustment	142,000
Estimated useful lives customer relationship	5 years
Amortization of intangible assets	2,300,000	1,100,000
Annual amortization expense	2,300,000
Number of years intangible assets will be amortized (in years)	3 years 6 months
Asset impairment charges	0
Indefinite-lived Intangible Assets [Line Items]
Cost	11,286,000	11,286,000
Accumulated Amortization	3,386,000	1,129,000
Other Intangible Assets [Member]
Indefinite-lived Intangible Assets [Line Items]
Cost	11,286,000	11,286,000
Accumulated Amortization	$ 3,386,000	$ 1,129,000