Derivatives And Hedging (Details) (USD $)			6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Minimum [Member]	Jun. 30, 2012 Maximum [Member]	Jun. 30, 2012 Mortgage banking operations [Member]	Jun. 30, 2011 Mortgage banking operations [Member]	Jun. 30, 2012 Mortgage banking operations [Member]	Jun. 30, 2011 Mortgage banking operations [Member]	Jun. 30, 2012 Other noninterest income [Member]	Jun. 30, 2011 Other noninterest income [Member]	Jun. 30, 2012 Other noninterest income [Member]	Jun. 30, 2011 Other noninterest income [Member]	Jun. 30, 2012 Interest rate lock commitments [Member]	Dec. 31, 2011 Interest rate lock commitments [Member]	Jun. 30, 2012 Forward commitments [Member]	Dec. 31, 2011 Forward commitments [Member]	Jun. 30, 2012 Interest rate swaps - broker-dealer [Member]	Dec. 31, 2011 Interest rate swaps - broker-dealer [Member]	Jun. 30, 2012 Interest rate swaps - customer [Member]	Dec. 31, 2011 Interest rate swaps - customer [Member]
Derivative [Line Items]
Interest rate lock period			10 days	60 days
Residential mortgage loans held for sale	$ 174,100,000	$ 192,400,000
Notional													507,009,000	181,456,000	557,000,000	315,579,000	41,239,000	43,213,000	35,943,000	45,820,000
Fair Value Asset													15,870,000	5,558,000	0	0	0	0	2,318,000	4,711,000
Fair Value Liability													0	0	3,671,000	3,785,000	4,152,000	4,527,000	0	0
Gain (loss) recognized in income					$ 1,707,000	$ (4,664,000)	$ (655,000)	$ (7,504,000)	$ (68,000)	$ 30,000	$ (680,000)	$ 37,000