Deposits (Details Textual) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Deposits (Textual) [Abstract]
Aggregate amount of certificates of deposit in denominations of $100,000 or more	$ 252,197	$ 241,217
Certificates of deposit denominations	$ 100,000