Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets (Amortization expense) (Details)

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Intangible Assets (Amortization expense) (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]    
Increase in goodwill $ 3,800,000us-gaap_GoodwillPeriodIncreaseDecrease  
Amortization expense $ 2,686,000us-gaap_AmortizationOfIntangibleAssets $ 2,411,000us-gaap_AmortizationOfIntangibleAssets