Derivatives and Hedging Activities (Details 7) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Summary of changes in fair value of residential mortgage loans commitments, forward sales agreements, and loans held for sale
TOTAL CHANGE IN FAIR VALUE
INTEREST RATE LOCK COMMITMENTS [Member]
Summary of changes in fair value of residential mortgage loans commitments, forward sales agreements, and loans held for sale
TOTAL CHANGE IN FAIR VALUE	465	468	566	900
FORWARD SALES AGREEMENTS [Member]
Summary of changes in fair value of residential mortgage loans commitments, forward sales agreements, and loans held for sale
TOTAL CHANGE IN FAIR VALUE	(1,141)	(750)	(1,354)	(1,829)
LOANS HELD FOR SALE FAIR VALUE ADJUSTMENT [Member]
Summary of changes in fair value of residential mortgage loans commitments, forward sales agreements, and loans held for sale
TOTAL CHANGE IN FAIR VALUE	$ 676	$ 282	$ 788	$ 929