Fair Value Measurements (Details 3) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
Financial assets, Carrying Amount
Cash and cash equivalents, Carrying Amount	$ 106,922	$ 200,193	$ 183,448	$ 127,742
Investment securities held to maturity, Carrying Amount	2,357	2,657
Loans, net, Carrying Amount	707,326	769,091
Financial liabilities, Carrying Amount
Deposits, Carrying Amount	930,413	1,049,273
Short-term borrowings, Carrying Amount	11,468	13,761
Financial assets, Estimated Fair Value
Investment securities held to maturity, Estimated Fair Value	2,471	2,884
Fair Value, Inputs, Level 2 [Member]
Financial assets, Estimated Fair Value
Cash and cash equivalents, Estimated Fair Value	106,922	200,193
Investment securities held to maturity, Estimated Fair Value	2,471	2,884
Financial liabilities, Estimated Fair Value
Deposits, Estimated Fair Value	929,587	1,052,382
Short-term borrowings, Estimated Fair Value	11,468	13,761
Fair Value, Inputs, Level 3 [Member]
Financial assets, Estimated Fair Value
Loans, net, Estimated Fair Value	$ 728,466	$ 798,381