Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Recurring | Fair Value
Securities available for sale:
Government-sponsored enterprise securities	$ 11,588	$ 11,596
Mortgage-backed securities	150,773	146,926
Corporate bonds	3,865	3,813
Equity securities	3,988	5,017
Total available for sale securities	170,214	167,352
Recurring | Quoted Prices in Market for Identical Assets (Level 1)
Securities available for sale:
Government-sponsored enterprise securities
Mortgage-backed securities
Corporate bonds
Equity securities
Total available for sale securities
Recurring | Significant Other Observable Inputs (Level 2)
Securities available for sale:
Government-sponsored enterprise securities	11,588	11,596
Mortgage-backed securities	150,773	146,926
Corporate bonds	3,865	3,813
Equity securities	3,988	5,017
Total available for sale securities	170,214	167,352
Recurring | Significant Unobservable Inputs (Level 3)
Securities available for sale:
Government-sponsored enterprise securities
Mortgage-backed securities
Corporate bonds
Equity securities
Total available for sale securities
Nonrecurring | Fair Value
Securities available for sale:
Impaired loans - covered	23,608	12,234
Impaired loans - non-covered	17,634	21,021
Other real estate - covered	30,156	47,290
Other real estate - non-covered	20,115	26,285
Nonrecurring | Quoted Prices in Market for Identical Assets (Level 1)
Securities available for sale:
Impaired loans - covered
Impaired loans - non-covered
Other real estate - covered
Other real estate - non-covered
Nonrecurring | Significant Other Observable Inputs (Level 2)
Securities available for sale:
Impaired loans - covered
Impaired loans - non-covered
Other real estate - covered
Other real estate - non-covered
Nonrecurring | Significant Unobservable Inputs (Level 3)
Securities available for sale:
Impaired loans - covered	23,608	12,234
Impaired loans - non-covered	17,634	21,021
Other real estate - covered	30,156	47,290
Other real estate - non-covered	$ 20,115	$ 26,285