Deposits (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Time deposits maturity as follows:
Within one year	$ 383,629	$ 375,862
After one year through two years	113,170	118,333
After two years through three years	80,016	78,492
After three years through four years	27,923	36,920
After four years through five years	14,972	17,106
Thereafter	4,815	5,046
Total	$ 624,525	$ 631,759
Within one year, Weighted average rate	61.40%	59.50%
After one year through two years, Weighted average rate	18.10%	18.70%
After two years through three years, Weighted average rate	12.80%	12.40%
After three years through four years, Weighted average rate	4.50%	5.80%
After four years through five years, Weighted average rate	2.40%	2.70%
Thereafter, Weighted average rate	0.80%	0.80%
Total, Weighted average rate	100.00%	100.00%