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

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

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

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-Name Accounting Standards Codification

-Topic 350

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Goodwill and Other Intangible Assets Expected future amortization expense (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 1,497,000us-gaap_AmortizationOfIntangibleAssets	$ 1,625,000us-gaap_AmortizationOfIntangibleAssets	$ 1,300,000us-gaap_AmortizationOfIntangibleAssets
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	1,000,000
Estimated annual amortization expense, year one	1,000,000
Estimated annual amortization expense, year two	1,000,000
Estimated annual amortization expense, year three	1,000,000
Estimated annual amortization expense, year four	1,000,000
Estimated annual amortization expense, year five	1,000,000
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	1,200,000
Estimated annual amortization expense, year one	1,200,000
Estimated annual amortization expense, year two	1,200,000
Estimated annual amortization expense, year three	1,200,000
Estimated annual amortization expense, year four	1,200,000
Estimated annual amortization expense, year five	$ 1,200,000