CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net income	$ 4,129	$ 11,189	$ 24,911	$ 40,267
OTHER COMPREHENSIVE INCOME (LOSS)
Unrealized holding gains (losses) on investment securities, net of deferred income tax expense (benefit) of $(1,226), $(2,288), $11,145 and $(7,998)	(2,275)	(4,252)	20,698	(14,855)
Reclassification adjustment for realized investment gains included in net income, net of income tax expense of $(252), $(89), $(1,613) and $(2,713)	(466)	(164)	(2,995)	(5,039)
Reclassification adjustment for amounts amortized into net periodic pension and postretirement benefit income, net of deferred income tax expense of $(62), $(169), $(327) and $(520):
Net actuarial loss	722	224	1,271	648
Prior service credit	(839)	(537)	(1,878)	(1,612)
Total reclassification adjustment associated with affiliate's pension and postretirement benefit plans	(117)	(313)	(607)	(964)
Other comprehensive income (loss)	(2,858)	(4,729)	17,096	(20,858)
Total comprehensive income	$ 1,271	$ 6,460	$ 42,007	$ 19,409