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Consolidation Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income	$ 178,939	$ 168,826	$ 158,495
Unrealized holding (losses) gains arising during year	(97,284)	43,015	(5,977)
Non-credit portion of other-than-temporary impairments recognized in other comprehensive income	0	23	(6)
Amounts reclassified into net income: Held-to-maturity securities	87	(116)	(92)
Amounts reclassified into net income: Non-credit other-than-temporary impairment	0	68	138
Amounts reclassified into net income: Realized losses (gains) on available for sale securities	31,316	(4,537)	3,064
Total unrealized (losses) gains on investment securities	(65,881)	38,453	(2,873)
Net actuarial loss	(8,906)	(3,700)	(7,852)
Amounts reclassified into net income: Net actuarial loss	1,680	1,367	4,200
Total defined benefit pension and post-retirement plans	(7,226)	(2,333)	(3,652)
Other comprehensive (loss) income	(73,107)	36,120	(6,525)
Comprehensive income	$ 105,832	$ 204,946	$ 151,970

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