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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net income	$ 41,426	$ 43,601	$ 91,866	$ 80,633
Unrealized holding gains arising during period	23,326	36,188	40,087	78,917
Non-Credit Portion of Other-Than-Temporary Impairments Recognized in Other Comprehensive Income	4	(6)	4	(6)
Amounts reclassified into net income: Held-to-maturity securities	(28)	(12)	(60)	(59)
Amounts reclassified into net income: Realized (gains) losses on available-for-sale securities	(1,225)	(1,145)	(244)	609
Total unrealized gains on investment securities	22,077	35,025	39,787	79,461
Amount reclassified into net income: Net actuarial loss	330	985	660	1,971
Total defined benefit pension and post-retirement plans	330	985	660	1,971
Other comprehensive income	22,407	36,010	40,447	81,432
Comprehensive income	$ 63,833	$ 79,611	$ 132,313	$ 162,065

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Net of tax amount of the reclassification adjustment related to held-to-maturity securities transferred from the available-for-sale category. This amount includes amortization and amounts realized from the disposal of these securities.

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