Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net unrealized holding gain (loss) from available for sale securities arising during the period, tax	$ 1,432	$ 2,808
Reclassification adjustment of net gain from sale of available for sale securities included in income, tax	0	0
Reclassification adjustment of net gain included in income, tax	0	0
Net unrealized gain from unfunded defined benefit plan liability arising during the period, tax	0	0
Less: amortization of unrecognized net actuarial loss included in net periodic pension cost, tax	$ (7)	$ (8)