Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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.

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

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- Definition

Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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Amount of amortization expense expected to be recognized during the fifth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of amortization expense expected to be recognized during the fourth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of amortization expense expected to be recognized during the third fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets (Details Textual) (USD $)	3 Months Ended			12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2015
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	4 years 3 months 20 days
Intangible asset amortization	$ 1,501,000us-gaap_AmortizationOfIntangibleAssets	$ 1,619,000us-gaap_AmortizationOfIntangibleAssets	$ 1,364,000us-gaap_AmortizationOfIntangibleAssets
Aggregate Amortization Expense 2016	4,100,000
Aggregate Amortization Expense 2017	2,300,000
Aggregate Amortization Expense 2018	2,000,000
Aggregate Amortization Expense 2019	1,700,000
Aggregate Amortization Expense 2020	953,000
Scenario, Forecast [Member]
Intangible asset amortization				$ 6,000,000