Derivatives And Hedging (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Derivative [Line Items]
Residential mortgage loans held for sale	$ 173,700,000		$ 173,700,000		$ 419,100,000
Derivative Asset, Fair Value	1,020,000		1,020,000		2,148,000
Derivative Asset, Fair Value, Gross Asset	1,020,000		1,020,000		2,148,000
Derivative Liability, Fair Value, Net	1,028,000		1,028,000		2,144,000
Derivative Liability, Fair Value, Gross Liability	1,028,000		1,028,000		2,144,000
Servicing Fees, Net	1,500,000	(2,100,000)	8,300,000	(183,000)
Minimum [Member]
Derivative [Line Items]
Interest rate lock period			10 days
Maximum [Member]
Derivative [Line Items]
Interest rate lock period			60 days
Interest rate lock commitments [Member]
Derivative [Line Items]
Notional	174,204,000		174,204,000		242,061,000
Derivative Asset, Fair Value	6,423,000		6,423,000		9,035,000
Derivative Liability, Fair Value, Net	0		0		0
Forward commitments [Member]
Derivative [Line Items]
Notional	288,000,000		288,000,000		531,000,000
Derivative Asset, Fair Value	0		0		0
Derivative Liability, Fair Value, Net	5,208,000		5,208,000		1,881,000
Interest Rate Swaps, Broker-Dealer [Member]
Derivative [Line Items]
Notional	25,152,000		25,152,000		44,846,000
Derivative Asset, Fair Value	0		0		0
Derivative Liability, Fair Value, Gross Liability	1,028,000		1,028,000		2,144,000
Interest Rate Swaps, Customer [Member]
Derivative [Line Items]
Notional	26,190,000		26,190,000		36,158,000
Derivative Asset, Fair Value, Gross Asset	1,020,000		1,020,000		2,148,000
Derivative Liability, Fair Value, Net	0		0		0
Mortgage Banking Operations [Member]
Derivative [Line Items]
Gain (loss) recognized in income	12,245,000	(2,694,000)	4,881,000	(3,349,000)
Other Miscellaneous Noninterest Income [Member]
Derivative [Line Items]
Gain (loss) recognized in income	$ 1,000	$ 80,000	$ 127,000	$ (600,000)