Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash dividends per share	0.50	0.51
Total losses on other-than-temporarily impaired	$ 1,318	$ 2,841
Losses recognized in earnings	323	2,358
Income tax effect	408	198
Retained Earnings
Cash dividends per share	0.50	0.51
Accumulated Other Comprehensive Income (Loss)
Total losses on other-than-temporarily impaired	1,318	2,841
Losses recognized in earnings	323	2,358
Income tax effect	$ 408	$ 198