Deposits (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Summary of time deposits maturity
Within one year	$ 362,053	$ 387,857
After one year through two years	117,667	118,470
After two years through three years	78,248	81,282
After three years through four years	38,665	33,395
After four years through five years	19,321	37,235
Thereafter	4,916	5,377
Total	$ 620,870	$ 663,616
Within one year, Weighted average rate	58.30%	58.50%
After one year through two years, Weighted average rate	19.00%	17.90%
After two years through three years, Weighted average rate	12.60%	12.20%
After three years through four years, Weighted average rate	6.20%	5.00%
After four years through five years, Weighted average rate	3.10%	5.60%
Thereafter, Weighted average rate	0.80%	0.80%
Total, Weighted average rate	100.00%	100.00%