Fair Value (Details Textual) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Fair Value (Textual) [Abstract]
Average basis points of loan amount	0.67%
Fall out rate of measuring fair value of rate lock commitments	7.00%
Fair value of mortgage loans held for sale	$ 150,378
Increase in fair value of loans held for sale	1,050
Fair value adjustment income	79
Rate Lock Commitments [Member]
Derivative [Line Items]
Aggregate principal balance of loans held for sale	218,464
Forward Sales Contracts [Member]
Derivative [Line Items]
Aggregate principal balance of loans held for sale	328,074
Mortgages held for sale [Member]
Derivative [Line Items]
Aggregate principal balance of loans held for sale	$ 149,328