Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net income		$ 27,484	$ 25,780	$ 74,148	$ 72,087
Unrealized gain from securities:
Net unrealized holding loss from available for sale securities arising during the period		(4,049)	10,126	23,229	8,161
Reclassification adjustment of net gain from sale of available for sale securities included in income		(364)	(151)	(748)	(829)
Net unrealized gain from securities, net of reclassification adjustment		(4,413)	9,975	22,481	7,332
Pension plan liability adjustment:
Unrecognized net actuarial gain (loss) during the period				0	(280)
Less: amortization of unrecognized net actuarial loss included in net periodic pension cost		107	62	319	153
Pension plan liability adjustment, net		107	62	319	(127)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	[1]	(4,306)	10,037	22,800	7,205
Total comprehensive income		$ 23,178	$ 35,817	$ 96,948	$ 79,292

[1] All amounts are net of tax. Amounts in parenthesis indicate debits.