Fair Value of Financial Instruments (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Investment securities available for sale:
Total securities available for sale	$ 282,202	$ 256,089	$ 282,846
Fair Value Measurement Using: Level 2
Investment securities available for sale:
Total securities available for sale	282,202	256,089	282,846
Recurring basis | Fair Value Measurement Using: Level 2
Investment securities available for sale:
Total securities available for sale	282,202		282,846
Recurring basis | Fair Value Measurement Using: Level 2 | U.S. Treasury
Investment securities available for sale:
Total securities available for sale			82
Recurring basis | Fair Value Measurement Using: Level 2 | Municipal bonds
Investment securities available for sale:
Total securities available for sale	98,585		94,885
Recurring basis | Fair Value Measurement Using: Level 2 | Mortgage-backed securities
Investment securities available for sale:
Total securities available for sale	183,617		187,879
Recurring basis | Assets at Fair Value
Investment securities available for sale:
Total securities available for sale	282,202		282,846
Recurring basis | Assets at Fair Value | U.S. Treasury
Investment securities available for sale:
Total securities available for sale			82
Recurring basis | Assets at Fair Value | Municipal bonds
Investment securities available for sale:
Total securities available for sale	98,585		94,885
Recurring basis | Assets at Fair Value | Mortgage-backed securities
Investment securities available for sale:
Total securities available for sale	$ 183,617		$ 187,879