Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets (Narrative) (Detail)

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Intangible Assets (Narrative) (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]    
Amortization of intangible assets $ 5,109us-gaap_AmortizationOfIntangibleAssets $ 2,821us-gaap_AmortizationOfIntangibleAssets
Estimated useful life 10 years 1 month 28 days