CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statements of Comprehensive Income/(loss)
Net income/(loss)	$ 103,405	$ 94,994
Other comprehensive income/(loss), net of tax:
Net unrealized gains/(losses) on securities available-for-sale	48,615	(59,543)
Net unrealized gains/(losses) on cash flow hedges	5,387	(8,793)
Net unrealized gains/(losses) on pension and other postretirement plans	1,463	1,287
Other comprehensive income/(loss)	55,465	(67,049)
Comprehensive income/(loss)	158,870	27,945
Comprehensive income attributable to noncontrolling interest	2,820	2,820
Comprehensive income attributable to controlling interest	156,050	25,125
Income tax expense/(benefit) of items included in Other comprehensive income:
Net unrealized gains/(losses) on securities available-for-sale	15,958	(19,543)
Net unrealized gains/(losses) on cash flow hedges	1,768	(2,887)
Net unrealized gains/(losses) on pension and other postretirement plans	$ 480	$ 422