CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statements of Comprehensive Income/(loss)
Net income/(loss)	$ 56,665	$ 113,742	$ 73,137	$ 217,147
Other comprehensive income/(loss), net of tax:
Net unrealized gains/(losses) on securities available-for-sale	(1,030)	48,192	87,248	96,807
Net unrealized gains/(losses) on cash flow hedges	17	8,909	13,078	14,296
Net unrealized gains/(losses) on pension and other postretirement plans	2,379	1,561	4,484	3,024
Other comprehensive income/(loss)	1,366	58,662	104,810	114,127
Comprehensive income/(loss)	58,031	172,404	177,947	331,274
Comprehensive income attributable to noncontrolling interest	2,851	2,852	5,703	5,672
Comprehensive income attributable to controlling interest	55,180	169,552	172,244	325,602
Income tax expense/(benefit) of items included in Other comprehensive income:
Net unrealized gains/(losses) on securities available-for-sale	(336)	15,819	28,451	31,777
Net unrealized gains/(losses) on cash flow hedges	5	2,924	4,265	4,692
Net unrealized gains/(losses) on pension and other postretirement plans	$ 776	$ 513	$ 1,462	$ 993