Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Comprehensive Income
Net income	$ 9,421	$ 9,365	$ 25,804	$ 25,131
Amortization of actuarial losses	174	149	522	447
Amortization of prior service credits	(7)	(6)	(19)	(19)
OTTI charges included in income	516		799	437
Reclassification adjustment for gains included in income	(54)	(54)	(1,673)	(54)
Unrealized gains (losses) on securities, net	(1,729)	5,034	(19,947)	8,303
Comprehensive income	$ 8,321	$ 14,488	$ 5,486	$ 34,245