Derivatives (Details) (Interest Rate Swap [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012
Derivative [Line Items]
Number of interest rate swap agreements	2	2
Fair value adjustment on loans held-for-sale	$ 156,000	$ 156,000
Payable under agreements	14,000	14,000
Maturity dates, notional amounts, interest rates paid and received and fair value of derivative [Abstract]
Notional Amount	5,900	5,900
Fair Value	(14)	(14)
Interest Rate swaps, maturing August 1, 2022 [Member]
Maturity dates, notional amounts, interest rates paid and received and fair value of derivative [Abstract]
Maturity Date		Aug. 01, 2022
Notional Amount	2,200	2,200
Interest rate paid	1.64%	1.64%
Interest rate received	0.44%	0.44%
Fair Value	5	5
Interest rate swaps, maturing September 27, 2022 [Member]
Maturity dates, notional amounts, interest rates paid and received and fair value of derivative [Abstract]
Maturity Date		Sep. 27, 2022
Notional Amount	3,700	3,700
Interest rate paid	1.74%	1.74%
Interest rate received	0.36%	0.36%
Fair Value	$ (19)	$ (19)