Goodwill and Intangible Assets (Details) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Goodwill and Intangible Assets [Abstract]
Goodwill	$ 14,916,000us-gaap_Goodwill	$ 14,916,000us-gaap_Goodwill
Estimated useful lives customer relationship	5 years
Amortization of intangible assets	2,300,000us-gaap_AmortizationOfIntangibleAssets	2,300,000us-gaap_AmortizationOfIntangibleAssets
Asset impairment charges	0
Indefinite-lived Intangible Assets [Line Items]
Cost	11,286,000	11,286,000
Accumulated Amortization	7,900,000	5,643,000
Other Intangible Assets [Member]
Indefinite-lived Intangible Assets [Line Items]
Cost	11,286,000	11,286,000
Accumulated Amortization	$ 7,900,000	$ 5,643,000

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

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-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

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-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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