Consolidation Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net income	$ 46,996	$ 53,162	$ 120,472	$ 100,477
Unrealized holding gains (losses) arising during period	5,442	(8,988)	(18,132)	41,767
Amount reclassified into net income: Held-to-maturity securities	(63)	(243)	(353)	(683)
Amount reclassified into net income: Non-credit other-than-temporary impairments	0	780	232	1,085
Amount reclassified into net income: Realized gains on available-for-sale securities	(199)	(10,683)	(10,906)	(18,637)
Total unrealized gains (losses) on investment securities	5,180	(19,134)	(29,159)	23,532
Amount reclassified into net income: Net actuarial loss	1,110	247	3,332	742
Total defined benefit pension and post-retirement plans	1,110	247	3,332	742
Other comprehensive income (loss)	6,290	(18,887)	(25,827)	24,274
Comprehensive income	$ 53,286	$ 34,275	$ 94,645	$ 124,751