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Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Statement of Comprehensive Income [Abstract]        
Net income $ 64,496 $ 51,817 $ 185,546 $ 149,467
Other comprehensive income, net of tax:        
Total securities available-for-sale and transferred 872 1,218 1,847 19,988
Total derivative instruments 1,111 2,015 2,921 1,589
Total defined benefit pension and other postretirement benefit plans 1,001 1,125 3,127 3,376
Other comprehensive income, net of tax 2,984 4,358 7,895 24,953
Comprehensive income $ 67,480 $ 56,175 $ 193,441 $ 174,420