Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Statement of Income and Comprehensive Income [Abstract]
SECURITIES: Unrealized losses arising during the period, income taxes	$ (197)	$ 1,067	$ (123)
SECURITIES: Reclassification adjustment for net gains included in net income, income taxes	(2)	0	(24)
PENSION: Change in plan assets and benefit obligations, income taxes	$ (247)	$ (1,338)	$ 939