Fair Value (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012
Fair Value (Textual) [Abstract]
Average basis points of loan amount	0.51%
Fall out rate of measuring fair value of rate lock commitments	7.00%
Fair value of mortgage loans held for sale	$ 113,723
Increase/Decrease in fair value of loans held for sale	(1,017)
Fair value adjustment gain/loss	(450)
Rate Lock Commitments [Member]
Derivative [Line Items]
Aggregate principal balance of loans held for sale	166,437
Notional of open forward delivery contracts [Member]
Derivative [Line Items]
Aggregate principal balance of loans held for sale	254,003
Mortgages held for sale [Member]
Derivative [Line Items]
Aggregate principal balance of loans held for sale	$ 114,740