Derivative Financial Instruments (Narrative) (Details) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Notional amount	$ 195.0	$ 195.0
Integra Bank [Member] | Customer Derivative Instruments [Member]
Notional amount	67.7
Fixed Interest Swaps [Member]
Notional amount	95.0	95.0
Fixed Interest Swaps On Commercial Loans [Member]
Notional amount	100.0	100.0
Interest Rate Lock Commitments [Member]
Notional amount	8.7	7.7
Forward Commitments [Member]
Notional amount	11.2	9.3
Customer Derivative Instruments [Member]
Notional amount	457.9	419.2
Offsetting Counter Party Derivative Instruments [Member]
Notional amount	$ 457.9	$ 419.2