Deposits Schedule of Deposits (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deposits [Abstract]
Non-interest bearing checking accounts	$ 107,670	$ 96,321
Percentage of non-interest bearing checking accounts to total deposits	11.10%	9.90%
Interest-bearing checking accounts	185,388	175,150
Percentage of interest-bearing checking accounts to total deposits	19.20%	17.90%
Money market accounts	182,001	192,593
Percentage of money market accounts to total deposits	18.90%	19.70%
Savings accounts	153,799	133,292
Percentage of savings accounts to total deposits	15.90%	13.60%
Core deposits	628,858	597,356
Percentage of core deposits to total deposits	65.10%	61.10%
Certificates of deposit, 12 months or less	254,719	271,434
Percentage of certificates of deposit to total deposits, 12 months or less	26.40%	27.80%
Certificates of deposit, 13 - 24 months	48,871	67,875
Percentage of certificates of deposit to total deposits, 13 - 24 months	5.10%	6.90%
Certificates of deposit, 25 - 36 months	19,142	20,205
Percentage of certificates of deposit to total deposits, 25 - 36 months	2.00%	2.10%
Certificates of deposit, 37 - 48 months	7,114	14,272
Percentage of certificates of deposit to total deposits, 37 - 48 months	0.70%	1.50%
Certificates of deposit, 49 - 60 months	6,681	5,283
Percentage of certificates of deposit to total deposits, 49 - 60 months	0.70%	0.50%
Certificates of deposit, over 60 months	406	999
Percentage of certificates of deposit to total deposits, over 60 months	0.00%	0.10%
Total certificates of deposit	336,933	380,068
Percentage of total certificates of deposit to total deposits	34.90%	38.90%
Total deposits	$ 965,791	$ 977,424
Percentage of deposits to total deposits	100.00%	100.00%
Weighted-average cost of deposits	0.46%	0.65%