Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Net income		$ 29,199	$ 21,259
Unrealized gain from securities:
Net unrealized holding loss from available for sale securities arising during the period		1,702	18,770
Reclassification adjustment of net gain from sale of available for sale securities included in income		0	(238)
Net unrealized gain from securities, net of reclassification adjustment		1,702	18,532
Pension plan liability adjustment:
Unrecognized net actuarial gain (loss) during the period		4,604	0
Less: amortization of unrecognized net actuarial loss included in net periodic pension cost		87	106
Pension plan liability adjustment, net		4,691	106
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	[1]	6,393	18,638
Total comprehensive income		$ 35,592	$ 39,897

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