Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net income	$ 22,222	$ 21,077	$ 43,202	$ 42,470
Other comprehensive income (loss), before tax:
Change in net unrealized gains/losses during period	(9,196)	2,816	1,412	17,167
Reclassification adjustment for net (gains) losses included in income	(46)	(17)	(52)	(88)
Change in unamortized loss on available-for-sale securities transferred into held-to-maturity	451	0	902	0
Defined benefit post-retirement benefits plans:
Change in net actuarial loss	13	35	28	70
Other comprehensive income (loss), before tax	(8,778)	2,834	2,290	17,149
Deferred tax benefit (expense) related to other comprehensive income	3,454	(1,115)	(901)	(6,748)
Other comprehensive income (loss), net of tax	(5,324)	1,719	1,389	10,401
Comprehensive income, net of tax	$ 16,898	$ 22,796	$ 44,591	$ 52,871