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Cash Equivalents - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Cash and Cash Equivalents [Abstract]  
Cash equivalent maximum maturity period 3 months
Increase in Cash account over the insured limit $ 8.6hbnc_CashCashEquivalentsInExcessOfFdicInsuredLimits