Derivative Financial Instruments (Balance Sheet Category and Fair Values of Derivative Instruments (Not Designated as Hedging Instruments)) (Details) (Not Designated as Hedging Instrument, USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Interest Rate Lock Commitments
Derivatives, Fair Value [Line Items]
Notional Amount	$ 267,397	$ 113,438
Interest Rate Cap
Derivatives, Fair Value [Line Items]
Notional Amount		20,000
Forward Commitments
Derivatives, Fair Value [Line Items]
Notional Amount	22,814	91,750
Notional Amount	348,297
Other Assets | Interest Rate Lock Commitments
Derivatives, Fair Value [Line Items]
Fair Value	9,353	3,697
Other Assets | Interest Rate Cap
Derivatives, Fair Value [Line Items]
Fair Value		0
Other Assets | Forward Commitments
Derivatives, Fair Value [Line Items]
Fair Value	462	(869)
Other Liabilities | Forward Commitments
Derivatives, Fair Value [Line Items]
Fair Value	$ (1,221)