Deposits (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Summary of time deposits maturity
Within one year	$ 393,866	$ 387,857
After one year through two years	118,902	118,470
After two years through three years	69,579	81,282
After three years through four years	38,859	33,395
After four years through five years	22,193	37,235
Thereafter	5,014	5,377
Total	$ 648,413	$ 663,616
Within one year, Weighted average rate	60.80%	58.50%
After one year through two years, Weighted average rate	18.30%	17.90%
After two years through three years, Weighted average rate	10.70%	12.20%
After three years through four years, Weighted average rate	6.00%	5.00%
After four years through five years, Weighted average rate	3.40%	5.60%
Thereafter, Weighted average rate	0.80%	0.80%
Total, Weighted average rate	100.00%	100.00%