Subordinated Debt (Details) (USD $)			3 Months Ended	12 Months Ended				3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012 Subordinated debentures	Dec. 31, 2012 Subordinated debentures	Mar. 31, 2013 Subordinated debentures	Sep. 30, 2012 Subordinated debentures Heritage Capital Trust I	Sep. 30, 2012 Subordinated debentures Heritage Statutory Trust I	Mar. 31, 2013 Subordinated debentures Heritage Statutory Trust II	Dec. 31, 2012 Subordinated debentures Heritage Statutory Trust II	Mar. 31, 2013 Subordinated debentures Heritage Statutory Trust III	Dec. 31, 2012 Subordinated debentures Heritage Statutory Trust III
Subordinated Debt
Interest rate (as a percent)						10.875%	10.60%
Subordinated debt, redemption amount						$ 7,000,000	$ 7,000,000
Premium cost						304,500	296,800
Dividends received from HBC as approved by DFI			15,000,000
Early payoff premium on redemption of debt				601,300
Interest rate at March 31, 2013 (as a percent)								3.86%		3.68%
Total subordinated debt	$ 9,279,000	$ 9,279,000		$ 9,279,000	$ 9,279,000			$ 5,155,000	$ 5,155,000	$ 4,124,000	$ 4,124,000
Variable rate basis								3-month Libor	3-month Libor	3-month Libor	3-month Libor
Interest rate margin (as a percent)								3.58%	3.58%	3.40%	3.40%