CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Net income	$ 20,330	$ 10,595
OTHER COMPREHENSIVE INCOME (LOSS)
Change in unrealized holding gains on investment securities, net of deferred income tax expense of $2,689 and $5,866	4,993	10,894
Reclassification adjustment for realized investment gains included in net income, net of income tax expense of $(764) and $(571)	(1,418)	(1,059)
Reclassification adjustment for amounts amortized into net periodic pension and postretirement benefit income, net of deferred income tax expense of $(190) and $(242):
Net actuarial loss	184	88
Prior service credit	(537)	(537)
Total reclassification adjustment associated with affiliate's pension and postretirement benefit plans	(353)	(449)
Other comprehensive income (loss)	3,222	9,386
Total comprehensive income	$ 23,552	$ 19,981