Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Consolidated Statements of Comprehensive Income (Parenthetical) [Abstract]
Unrealized gains arising during the period on available for sale securities, tax	$ (209)		$ 47
Reclassification adjustment for net gain on sales of available for sale securities included in net income, tax	0	[1]	(5)	[1]
Change in defined benefit plans, tax	$ 2	[1]	$ (11)	[1]

[1] Income tax amounts are included in the provision for income taxes in the Consolidated Statements of Income