Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net income	$ 12,260	$ 9,561
Other comprehensive income, net of tax:
Amortization of actuarial losses, net of taxes of ($64) and ($83) for the three months ended March 31, 2017 and 2016, respectively	87	109
Amortization of prior service credits, net of taxes of $4 and $5 for the three months ended March 31, 2017 and 2016, respectively	(7)	(6)
Net unrealized gains on securities, net of taxes of ($811) and ($5,028) for the three months ended March 31, 2017 and 2016, respectively	1,148	6,770
Total other comprehensive income, net of tax	1,228	6,873
Comprehensive income	$ 13,488	$ 16,434