CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Unrealized investment gains - taxes	$ 68	$ 0	$ 244	$ 0
Reclassification adjustment for realized gains on investment securities included in net income - taxes	(11)	0	94	0
Change in unfunded benefit obligation for pension and other postretirement benefit plans - taxes	$ 90	$ 66	$ 263	$ (7)