Fair Value of Financial Instruments (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Investment securities available for sale:
Total securities available for sale	$ 235,116	$ 256,089	$ 313,047
Fair Value Measurement Using: Level 2
Investment securities available for sale:
Total securities available for sale	235,116	256,089	311,990
Fair Value Measurement Using: Level 3
Investment securities available for sale:
Total securities available for sale			1,057
Recurring basis | Fair Value Measurement Using: Level 2
Investment securities available for sale:
Total securities available for sale	235,116		311,990
Recurring basis | Fair Value Measurement Using: Level 2 | U.S. Treasury
Investment securities available for sale:
Total securities available for sale			83
Recurring basis | Fair Value Measurement Using: Level 2 | Corporate
Investment securities available for sale:
Total securities available for sale			9,169
Recurring basis | Fair Value Measurement Using: Level 2 | Municipal bonds
Investment securities available for sale:
Total securities available for sale	85,433		94,747
Recurring basis | Fair Value Measurement Using: Level 2 | Mortgage-backed securities
Investment securities available for sale:
Total securities available for sale	149,683		207,991
Recurring basis | Fair Value Measurement Using: Level 3
Investment securities available for sale:
Total securities available for sale			1,057
Recurring basis | Fair Value Measurement Using: Level 3 | Mortgage-backed securities
Investment securities available for sale:
Total securities available for sale			1,057
Recurring basis | Assets at Fair Value
Investment securities available for sale:
Total securities available for sale	235,116		313,047
Recurring basis | Assets at Fair Value | U.S. Treasury
Investment securities available for sale:
Total securities available for sale			83
Recurring basis | Assets at Fair Value | Corporate
Investment securities available for sale:
Total securities available for sale			9,169
Recurring basis | Assets at Fair Value | Municipal bonds
Investment securities available for sale:
Total securities available for sale	85,433		94,747
Recurring basis | Assets at Fair Value | Mortgage-backed securities
Investment securities available for sale:
Total securities available for sale	$ 149,683		$ 209,048