Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Allowance, loans	$ 17,297	$ 19,742
Preferred shares, par value
Preferred shares, shares authorized	200,000	200,000
Preferred shares, shares issued	23,184	23,184
Common shares, par value
Common shares, shares authorized	20,000,000	20,000,000
Common shares, shares issued	8,455,881	8,455,881
Treasury shares, shares	747,964	747,964