Disclosures About Fair Value of Financial Instruments (Details 4) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Total assets	$ 68,272	$ 71,488
Loans evaluated for impairment
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Total assets	52,926	54,729
Real estate owned
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Total assets	15,346	16,759
Level 3
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Total assets	68,272	71,488
Level 3 | Loans evaluated for impairment
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Total assets	52,926	54,729
Level 3 | Real estate owned
Fair value measurement for nonrecurring assets that had a fair market value below the carrying amount
Total assets	$ 15,346	$ 16,759