CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Net income	$ 10,595		$ 14,273
OTHER COMPREHENSIVE INCOME (LOSS)
Change in unrealized holding gains on investment securities, net of deferred income tax expense of $5,866 and $3,698	10,894		6,867
Reclassification adjustment for realized investment gains included in net income, net of income tax expense of $(571) and $(934)	(1,059)		(1,734)
Reclassification adjustment for amounts amortized into net periodic pension and postretirement benefit cost (income), net of deferred income tax (expense) benefit of $(242) and $189:
Net actuarial loss	88		466
Prior service credit	(537)		(115)
Total reclassification adjustment associated with affiliate's pension and postretirement benefit plans	(449)		351
Other comprehensive income	9,386	[1]	5,484
Total comprehensive income	$ 19,981		$ 19,757

[1] All amounts are net of tax. Amounts in parentheses indicate debits.