CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statements of Comprehensive Income/(loss)
Net income/(loss)	$ 16,472	$ 103,405
Other comprehensive income/(loss), net of tax:
Net unrealized gains/(losses) on securities available-for-sale	88,278	48,615
Net unrealized gains/(losses) on cash flow hedges	13,061	5,387
Net unrealized gains/(losses) on pension and other postretirement plans	2,105	1,463
Other comprehensive income/(loss)	103,444	55,465
Comprehensive income/(loss)	119,916	158,870
Comprehensive income attributable to noncontrolling interest	2,852	2,820
Comprehensive income attributable to controlling interest	117,064	156,050
Income tax expense/(benefit) of items included in Other comprehensive income:
Net unrealized gains/(losses) on securities available-for-sale	28,787	15,958
Net unrealized gains/(losses) on cash flow hedges	4,260	1,768
Net unrealized gains/(losses) on pension and other postretirement plans	$ 686	$ 480