Deposits - Additional Information (Detail) $ in Millions	Dec. 31, 2015 USD ($)
Time Deposits [Abstract]
Time deposits of $250,000 or more	$ 574

The aggregate amount of domestic and foreign time deposit liabilities (including certificates of deposits, individual retirement accounts and open accounts) in denominations of $250,000 or more.

No definition available.

Name:	hbhc_TimeDeposits250000OrMore
Namespace Prefix:	hbhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant