Derivatives And Hedging (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Derivative [Line Items]
Residential mortgage loans held for sale	$ 419,100,000	$ 192,400,000
Minimum
Derivative [Line Items]
Interest rate lock period	10 days
Maximum
Derivative [Line Items]
Interest rate lock period	60 days
Interest rate lock commitments
Derivative [Line Items]
Notional	242,061,000	181,456,000
Fair Value Asset	9,035,000	5,558,000
Fair Value Liability	0	0
Forward commitments
Derivative [Line Items]
Notional	531,000,000	315,579,000
Fair Value Asset	0	0
Fair Value Liability	1,881,000	3,785,000
Interest rate swaps - broker-dealer
Derivative [Line Items]
Notional	44,846,000	43,213,000
Fair Value Asset	0	0
Fair Value Liability	2,144,000	4,527,000
Interest rate swaps - customer
Derivative [Line Items]
Notional	36,158,000	45,820,000
Fair Value Asset	2,148,000	4,711,000
Fair Value Liability	0	0
Mortgage Banking Operations [Member]
Derivative [Line Items]
Gain (loss) recognized in income	9,816,000	(10,297,000)	(8,871,000)
Other Noninterest Income [Member]
Derivative [Line Items]
Gain (loss) recognized in income	$ (553,000)	$ 61,000	$ 110,000