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Summary of Significant Accounting Policies (Narrative) (Detail)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Accounting Policies [Abstract]    
Anti-dilutive stock options and awards excluded from computation of earnings per share 818,059us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 838,801us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount