Goodwill and Intangible Asset (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Goodwill and Intangible Assets [Abstract]
Goodwill	$ 14,916,000		$ 14,916,000		$ 14,916,000
Estimated useful lives customer relationship			5 years
Amortization of intangible assets	600,000	600,000	1,700,000	1,700,000
Annual amortization expense	2,300,000
Number of years intangible assets will be amortized			3 years
Asset impairment charges			0
Finite-Lived Intangible Assets [Line Items]
Cost	11,286,000		11,286,000		11,286,000
Accumulated Amortization	5,079,000		5,079,000		3,386,000
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	11,286,000		11,286,000		11,286,000
Accumulated Amortization	$ 5,079,000		$ 5,079,000		$ 3,386,000